I recently purchased this:
The question is, what is it?
Asymmetric case, DO90 bezel, short indices painted logo dial….looks like a 1969 cal 861 right? Some side shots show a pretty well used case, that has had some less than expert polishing.
The engraved back and DO90 clash. It cannot be a 1969 speedmaster with that back.
So lets open it:
Now we clearly have some issues – the case is a 145.022, later than 1978 as there is no date. The movement is a 321 which never went into a case this late. lets check the number:
Movement number 17761681. This is possibly a 2998 movement, based only on matching this movement to known 2998s in my collection. The nearest I have is 17761171.
Note the asymmetric clutch bridge which is correct for an early movement like this.
I bought this watch as a parts donor, the DO90 bezel was the main attraction. I know nothing about it, it was a German Ebay special.
I think this must be a watch heavily serviced. The movement shows signs of work and is probably from a 2998. If this had been serviced by omega in the mid 1980’s then it is possible they replaced everything except the movement. The movement appears in good shape, with the exception of a non centering hour recorder, which is usually corrected at service.
We could argue that is is an assembly, but as the parts are all service parts, I think it more likely to have once been a 2998, and serviced by replacing the case, dial and hands.