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Uncompromising Design:

We'll let you in on a secret: This caseback almost didn't make it into production.


Utilizing a conventional sapphire dome wasn't possible. Any design doing so would result in two outcomes: Add too much to the svelte profile of these vintage bumper dress watches, or only show part of the movement. 


To bring our vision into reality, we employed the most costly of measures: Developing a special aspherical sapphire element, painstakingly ground from optical-grade sapphire glass. The dramatic, aspherical profile of the element allows for the absolute minimal profile and full view of the movement. 


This bubble dome, designed solely for Omega's bumper half-rotor and early full-rotor movements, is the basis for our screw-back sapphire exhibition caseback for 1950s Omega Constellations and Automatics. With this screw-down caseback, you can view the workings of your timepiece without compromising its svelte profile! Whether you have an early Automatic or a fine bumper Constellation, you can take in its warm, coppery tones at your leisure!



No Expense Spared:

As with all of our casebacks, we use a high standard of finishing to evaluate our parts. We carefully machine the hardened 316L steel and diligently apply a smooth mirror polish. The costly aspherical sapphire dome is then precisely pressed into place and tested for proper fitment. 


If you have any questions, feel free to send a message, and we'll get back to you as soon as possible!


Sapphire Exhibition Caseback for 1950s Vintage Constellations and Automatics

SKU: C3-CB2-2024
  • This is a threaded caseback designed for select 1950s Omega dress watches. It is not designed to be compatible with divers or chronographs. The caseback is confirmed to fit the following references:

    Constellation 2652 (caliber 352/354)

    Seamaster 2627 (caliber 353)

    Automatic CK 2635 (caliber 351 / 354)
    Automatic CK 2636 (caliber 341 / 344)

    This caseback is not designed to fit the CK2577 Seamaster. Another is in the works that will offer compatibility.

    If your reference isn't in this list, contact us with it, and we can check to see if this caseback is compatible with your watch. 

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