Momentum® by St. Moritz Watch Corporation
Service Information
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2/4/6 Year Extendible Warranty

A number of St. Moritz and Momentum® watch models have a 2/4/6 warranty. You must retain your purchase receipt for proof of warranty (this will be required for all warranty work). All of our watches are guaranteed to be free from defects in manufacture for an initial period of at least 2 years (see manual for details). At the end of 2 years, we recommend that you extend your warranty by sending your watch to a St. Moritz / Momentum® Service Centre for a Full Service. The price of the service includes a 2 year warranty extension. After 4 years of ownership, send it in for another Full Service and extend the warranty for a final two years (for a total of 6 years from original purchase date).

Some models have special warranties (e.g. our long-life battery M50 & Logic models have a simple 6 year warranty, as no regular battery changes are necessary) and do not qualify for extended warranty program. Check the warranty on your specific model for more information.

What is covered?

  • Any manufacturing defects.
  • The accuracy and reliability of the watch movement.
  • The waterproof performance of the watch. (N.B. see notes on use of screw-down crown)

What is not covered?

  • Water damage caused by failure to screw in the crown correctly.
  • Batteries*
  • Crystals
  • Bands and bracelets
  • Damage caused by normal wear-and-tear or aging.
  • Damage caused by abuse, misuse or accidents.
  • Watches opened or serviced by anyone other than our Factory- or Authorized Service Centers.

* (Battery life can vary significantly, depending on how long the dealer has a watch in stock prior to sale, use of alarms, backlights, etc., therefore it is impossible to guarantee battery life.)

About Screw-down crowns

The crown is the "winding knob" used to set the time and date on any watch with a normal dial and hands. Most St. Moritz and Momentum® watches feature screw-down, locking crowns. Better than a simple push/pull crown, this type of crown is designed for more extreme conditions and makes your watch more reliably water-resistant.

Essentially, the screw-down crown screws into your watch, like the hatch on a submarine. Screwing it firmly in against the case squeezes a rubber o-ring between the metal crown and the watch casing, thereby giving a positive water-resistant seal.

To adjust the time or date on your watch, you will need to grasp the crown and turn it a number of turns in a counter-clockwise direction, to unscrew it from the case, before you can pull out the crown to set the watch. Once the watch is set, you will need to screw the crown back in, by pressing it firmly against the case (it is spring-loaded!) and simultaneously turning it in a clockwise direction. Then, taking care not to force or cross-thread the crown, turn it until it is snug against the case and finger-tight. (No need for pliers!)

Screw Crown Image

It is absolutely essential that the screw down crown is fully closed before using your watch on or in the water and we recommend that this is checked each time prior to contact with water. Any warranty whatsoever will be invalidated if this vital procedure is not adhered to, any watches returned under warranty that have suffered from water penetration will be pressure tested to check the effectiveness of the screw down crown. The most common problem with any water-resistant watch is moisture leaks or damage, typically caused by failure to screw the crown in correctly.

If your watch leaks:
Send the watch in to us a soon as possible. On receipt (provided there is no obvious damage like a cracked or broken glass), our technicians make sure the crown is screwed in correctly, then set the watch in one of our precise water-resistant testing machines. If the tester shows that the watch is not water-tight, despite the crown being screwed in correctly, your watch will generally be repaired or replaced immediately, then returned to you at no charge. If the tester shows that the watch is completely water-tight, then this is a clear indication that the moisture damage has been caused by the crown not being screwed in correctly. If this is the case, we will contact you to advise you of the cost of the repair. We make every effort to keep our repair costs for this type of repair as low as possible.

Service & Repairs

What is a Full Service?

This is a chargeable, complete maintenance service. Many customers, especially those who wish to ensure the long-term water-resistance of their watch, particularly appreciate this service. Some customers prefer to let our warranty lapse, and have their watch serviced locally. This decision is completely at your discretion.

Our Full Service includes:

  • Supplying and installing a fresh, high quality battery of the correct specification
  • Checking all seals/ o-rings and lubricating/flipping/replacing them as necessary
  • Resealing the watch and testing it to ensure proper waterproof seal to original specs.
  • Recording details of the service for warranty-tracking purposes
  • A 2 year extension of the existing warranty, where applicable** (up to max. 6 years)
  • The cost of shipping & insurance to return the watch to you (only available in Canada and the US).

** Full Service Packages include an extension of the original warranty, for as long as parts are available (up to a total of six years from the date of purchase). Please note, however, that a Full Service for older, discontinued models may not include an extension of the warranty, if original parts are in limited supply or unavailable. Full Service option is not available on all models.

Factory Full Service?

  1. Ensures your watch is professionally serviced
  2. Guarantees ongoing water-resistant performance.
  3. Ensures that the correct specification, original parts are used for any repairs.
  4. Even though some parts are not included in the Full Service (e.g. replacement bands, replacement crystals), nobody has a better selection of original St. Moritz and Momentum® parts and replacement bands, or can offer Service Upgrade Options like the virtually scratchproof sapphire crystals.
  5. Nobody knows your watch better than we do.

Local Service?

  1. May have lower initial cost (no shipping & insurance costs, no service record tracking, etc.)
  2. May be quicker. (no delay while the watch is in transit to our Service Centre)

BUT... please note that having your watch serviced elsewhere will void our warranty. Local battery or repair shops do not have original parts (e.g. no replacement crystals, replacement bands, etc), and rarely offer an ongoing guarantee of water-resistance (no machine to test this).

What will it cost?

A Full Service generally costs $35 - $60. Specific models, particularly mechanical and automatic caliber watches start at $135. Most customers send their watch directly to our closest Service Center. Should you wish to have your local dealer send in the watch for you, there may be a nominal extra charge added, to cover the dealer's out-of-pocket expense in shipping the watch on your behalf.

How to return a watch for service or repairs

If you need to send in your watch for factory servicing or for any repairs, simply check here to verify the correct Service Center address, and then send us your watch.

To simplify this process, you can click below to download a Service & Repair Form, which you can print, fill out and enclose with your watch. The completed form will help us offer you faster and more efficient service. Upon receipt of your watch and the completed form, we will carry out the requested repairs and return the watch to you promptly.

Service & Repair Form (EN - 396KB PDF)

Formulaire Service (FR - 396KB PDF)

Super Full Service Form - Refurbishment Upgrade for Large M1 and Large Atlas


Some pointers for sending in a watch:

  1. Send it to the correct Service Center (see locations).
  2. Address it to "The Service Center". We recommend that you do not include reference to "Watches", "St. Moritz" or "Momentum" on the outside of the package, as this increases the risk of theft in transit.
  3. Do not enclose the original gift box, as this simply increases the shipping weight and cost, but do package the watch carefully to prevent damage in transit. (e.g. wrap in bubble wrap).
  4. Ensure that the package is adequately insured and if possible obtain a tracking number. We are not responsible or liable for any damaged items or lost parcels while in transit to one of our facilities.
  5. Include a copy of the original purchase receipt if the repair is being sent due to a warranty issue. 
  6. Whenever shipping your watch across any international border, you must indicate "returning product to manufacturer for repair & return only. Value for customs purposes only. No commercial value." You are responsible for all duties, taxes, freight or other fees associated with shipping your watch to our Service Centres. Failure to do so may result in refusal of the package.
  7. If you do not use our Service & Repair Form (above), please ensure that you provide us with your name, contact details and a brief explanation of the repair or service required. Including your email address will prevent delays by allowing us to contact you quickly, if necessary.

How do I size my metal bracelet?

For a brief tutorial on bracelet sizing, please check out the video below. In addition, here is a step-by-step guide on sizing a bracelet.


Most of our watches use heat-tempered, mineral crystals. These crystals are of a very high quality and most customers find them sufficiently hard and scratch-resistant for their purposes.

If a mineral crystal does get scratched (some of our customers can be pretty rough on their watches!), it is not possible to buff or polish the scratched crystal. The watch has to be sent in to our Service Center, to have the crystal replaced and the watch properly resealed and tested.

Some high-end watches offer sapphire crystals, which are virtually scratchproof. Until recently, the cost of sapphire crystals was prohibitively high for all but the most expensive watches, but sapphire crystal prices are gradually decreasing to more affordable levels. We do now offer sapphire crystals as standard on some of our watches, and as an upgrade option on a growing list of models in our line. These crystals are made of synthetic sapphire and are virtually impossible to scratch, unless you drag a diamond across them. (But please note that a hard impact can still shatter a sapphire crystal; they may be virtually scratchproof, but they are not unbreakable!) If this is of interest to you, our service desk can advise you whether a sapphire crystal is available for your watch.

Replacement Bands

We offer a full selection of original St. Moritz and Momentum® replacement bands. We are known for the quality of our bands, most of which are specially made for us in Italy. Replacement bands are available to order through Authorized Dealers, or through us directly by contacting us by phone, email or accessing the ordering section here.

Our catalogs and this website show our most popular watch and band combinations, but if there is a special band color or type you are looking for and do not find it illustrated, check with our service desk for other available combinations. (e.g. we never expected to sell blue and orange watch dial/band combinations, so these are not illustrated here, but we supply regular quantities of this slightly unusual color combination to fans of the Florida Gators!)

By registering your purchase of any St. Moritz or Momentum® watch, you will automatically qualify for a special 10% discount on any original replacement bands you order on our website. If you have not already registered and wish to do so now, please click here.

If you are already registered, then you can simply log in, select Replacement Bands, then navigate your way to your watch with the band option you require, add the item to your cart, and complete your order.  Our Service Department will receive notification of your order request by email and will process the order accordingly within 1-3 business days.