Omega movement ring/spacer for cal 863 / 1863 crystal caseback

Ron_W · Jul 8, 2026

It is different for a sapphire caseback on the cal 1863 then the standard ring for a cal 861, you see an example on the right here with the part nr.
I know SwissVintage has one from the UK but with import fee and custom charges it is to expensive.
Thanks for looking and hope to hear from someone !
Best, Ron

watchlovr · Jul 9, 2026

I did that conversion.
The ring for the sapphire back is taller as you don’t have a dust cover.
You can actually use a rubber gasket of the correct size, sits on top of the ring, stops it rattling and is not visible.
Takes a few tries to get right.

I hope this helps.

C

Ron_W · Jul 9, 2026

watchlovr
I did that conversion.
The ring for the sapphire back is taller as you don’t have a dust cover.
You can actually use a rubber gasket of the correct size, sits on top of the ring, stops it rattling and is not visible.
Takes a few tries to get right.

I hope this helps.

C

Thanks C
That is how i have it now and the extra O ring does the job, but i prefer it to be correct so the search is on. Already have the odd size O-ring specially for the movement ring so hopefully i will not be a long search.

Omega movement ring/spacer for cal 863 / 1863 crystal caseback

Ron_W

watchlovr

Ron_W

Similar threads

112ST1589 OMEGA Speedmaster Professional 145.0022 Sapphire Caseback Moonwatch Stainless Steel 1863 1861 062SN5126 3573.50 311.30.42.30.01.006

Which movement ring do i need for a cal 861 to fit in a professional case?

Omega Speedmaster Mitsukoshi Mod Ref. 3572.50, Cal 863, 1992

Omega Speedmaster Professional Italian Limited Edition Sapphire Caseback and Movement Ring

Sapphire Caseback and Movement Ring for 861 or 1861 Speedmaster

1992 Omega Speedmaster Professional 3592.50 Sandwich Cal. 863 Gilt Movement