For Admiralty Experts: case back compatibility

Hello!

Does anyone know if the Admiralty 135.015 case back is the same design/ dimensions / compatible as the 135.042 ?
Both have the same grooves and face transition from side to top. It also has the same “waterproof” engraving.

I’m looking for this part for the diver model and everything on the case back looks the same on an .015 that I found online, except for the reference.

Thank you for any input!