How rigorous is ”SC”

All,

Would appreciate some opinion on a recent purchase; Just bought a beautiful and vere well preserved 2848-2846 in 14K gold. Movement is a cal 491 serial dating it to 1955 (148xxxxx). Case back says 2909 SC, which would mean a center second watch, but 491 is obviously a sub sec.

The watch is well retained, not sure if ever serviced (no markings nor trace or scratches). Crystal was rough but polished up nicely, omega logo at centre. Lugs sharp, sign of oxidation which could be expected from an old 14k case, not polished (imo)

Lume intact, dial looks orig with light patina.

So; is this a case of a movement/dial to new case swap at some stage in history? Or could it be a potential mismatch from the outset; the SC not always being consistent with a centrr sec mivement? I have understood that back in the days there quite some variations and rules might not be definite?

Thanks for opinions!

M

Very nice watch.

The case back is triple marked. 2846 is the SC version and 2848 is the sub-second version. Not familiar with 2909. I believe yours is a 2848 and I don’t think they’d mark 2848 on the case back if it was only supposed to be a case for an SC model, so I think you’re fine.

Many thanks - the double/triple was an ”aha” moment...great insights!

Again thanks!