Franck Muller Master Calendar Watch Repair and Polishing - Top Watch Service and Refinishing in the USA

Gray & Sons repair department specializes in solving client problems, from a drop on the floor to a water entrance in the pool; we are the best solution for your watch repair problems. No matter how complicated things are, our expert master watchmakers with over 150 years of combined experience will utilize all their knowledge and experience to make sure you get your watch back running and looking like new. We repair all kinds of Swiss watches and always welcome the repairs that no one wants to take.

In this particular situation, A Franck Muller came into our repair center not running or functioning properly. This rare piece, a limited edition 18K rose gold Franck Muller reference 5850 MC (Master Calendar) had to be disassembled completely in order to find the problem. Once taken apart by our master watchmaker to the last screw we discovered the problem. As you can see from the pictures below, one small tooth from the calendar assembly wheel had broken off leaving a big gap in the wheel. This extremely hard part to acquire and replace had to be fixed. This is where the experience of our Swiss-trained master watchmaker came into play. Now you may be asking “where did that loose metal piece go?” It was jammed between other moving gears of this ETA 2892 movement not allowing the gears to turn properly. Thankfully the client did not force wind the watch which could have caused much more irreversible damage to this elegant timepiece. After precision soldering, detailing, and hand finishing our master watchmaker was able to repair the once broken wheel. Now with the wheel fixed, the watch will go through an overhaul and detail. The now disassembled movement is placed in our ultrasonic cleaning machine and goes through a 4 step cleaning process in which all old oils, lubricants, and grime are removed the movement. After this deep cleaning the movement is ready to be reassembled and given the appropriate amount of new oils. This process is very delicate and precise. If a part is installed with too much or too little oil, or too tight or too loose, this will cause the movement to not keep time correctly.

Furthermore, this Frank Muller had additional complications which required a bit more work than any classic Franck Muller Swiss watch. This model reference 5850MC displays not only the Date using a beautiful red hand indicator but also the day of the week and the month at the top center of the dial. To complete this beautiful watch, all the information is displayed on a distinct tonneau shaped dial and the famous Franck Muller Arabic numerals. This case was in perfect condition when it came to us so there was no need for our master in-house polisher to perform any work on it but keep its original finish. Now in most cases all bracelets and watch cases are detailed and polished to a like-new condition.

Our Franck Muller Master Calendar broken calendar wheel before and after

Franck Muller Master Calendar broken calendar wheel

Are you looking for a Franck Muller repair in Miami Florida or out of State?

Look no further. Gray and Sons repair service center can handle everything from Rolex, Cartier, Patek Philippe, Audemars Piguet, Breitling, Omega, Franck Muller and many more. We serve all of South Florida, including but not limited to Brickell, Aventura, Bal Harbor, Coconut Grove, Coral Gables and so on. Come to our showroom at 9595 Harding Ave in Surfside Florida for a first-class experience and quality. Looking to repair your watch and you are not local in Florida? Go to our website at and request an Easy-Ship box.

Franck Muller Master Calendar completed watch repair

Franck Muller Master Calendar watch repair

Request pre-labeled Easy Ship Box and mail in your item to repair.

Request an Easy Ship Box
Once you receive the box and send your watch, one of our Master Watchmakers will evaluate it and contact you with a free estimate. If you approve of the estimate we will proceed with the repair, which generally takes 2-3 weeks.
If you wish to repair at a different time we will ship the watch back to you at no cost to you.