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A COA service (a.k.a. COR or Overhaul) is our most complete service. Most manufacturers recommend that you have a COA completed every 3 to 5 years. Unlike the “service” offered by some other watch care facilities, where they may simply “clean your watch case and add a little oil”, our expert watchmakers follow manufacturers service guidelines to provide a fully intensive service.


A COA service consists of the following:

  • Disassembly of the watch case, bracelet, and movement with a careful assessment of all parts for wear and damage.

  • Movement parts are thoroughly cleaned in a multi-stage ultrasonic cleaning machine. Worn or damaged parts are replaced.

  • The movement is reassembled using several types of high quality horological lubricant. The correct lubrication of the movement is essential to ensuring your watch continues to serve you for years to come.

  • Using an electronic timing machine the movement is calibrated and adjusted for correct time keeping. The movement is tested in multiple orientations in order to verify the correct Amplitude and Beat Rate and to reduce Beat Error.

  • The case and bracelet are polished, refinished and ultrasonically cleaned to remove scratches and blemishes.

  • The watch is reassembled with new gaskets and seals, and if applicable, a water-pressure test is performed.

  • All watches are then monitored during a 48 to 72 hour time test before being returned to the client.

coa - clean, oil & adjust 



(214) 363.8463

12801 N Central Expressway Ste 110
Dallas, TX 75243

conveniently located in the main lobby of the north central plaza building 3

Corner of LBJ & Central Expressway

We are a short drive away from Richardson, Carrollton, Farmers Branch, Addison, Allen and McKinney. 

If you need good directions, please call us. We're glad to help.


MON - FRI  9:00 - 4:00

all work done on premises

one year service warranty

state of the art facility

fully insure by jewelers mutual

and as always, free watch repair estimates

© Copyright 2018 Time Repairs Dfw | All Rights Reserved

TIME REPAIRS DFW is an independent company and is not affiliated with any watch manufacturer or distributor. Application of custom accessories will void the watch manufacturer's original warranty and will preclude factory service. Rolex is a registered trademark of Rolex Watch U.S.A., Inc.