There seems to be a confessional tradition of sorts here wherein we own up to dumb mistakes we made when we first got interested. Here's mine, I've been hiding it away from my own eyes for a couple of years now, but today's the day I face up to it.
I bought the enclosed calibre 283 in a case that had a passing connection to a C case, and then found that the back is not engraved with the Omega symbol and model number. Ouch.
Question one: Looking at the machining it seems unlikely that this is a genuine Omega case to which the back has been change. Back is a bubble style steel snap back with no markings. Is it simply a re-cased movement in a shabby case? Crown is obviously incorrect, the least of my worries.
Question two: what case style / model number does it belong to? The OVD seems to suggest CK 2504 or CK 2537. Any opinions on that? Can 'one' be definitive in such a case? The guilloche dial does seem relatively common out there.
Question three: what to do with it? I've been keeping my eyes open, but not certain what case I should be hunting down; in any event, this seems incredibly unlikely to show up. So... throw it on eBay? Or, or or? The dial is in pretty good shape, kinda nice looking, I think.
Thanks, folks!

 

Can we see the case back? (Inside and out)

 

To follow on from my first post... there is, for example this on the 'Bay. Call me suspicious, but does anyone think that it is 'authentic'? It's CK2750.
http://www.ebay.co.uk/itm/VINTAGE-O...365344805?pt=Wristwatches&hash=item3f2ea28e25Purchases made through these links may earn this site a commission from the eBay Partner Network

 

Why do you doubt it?

 

The lack of markings, coupled with the relatively coarse machining on the case. There is a small amount of brassing, very small evidence of pitting, so the plating is good quality, on the other hand.

 

Calibre 283 should never turn up in a C-style case, I think. The movement is not even fitted with the correct mounting screws. It is very odd that someone should make a case for such a low-value movement, really, but that seems to be what happened. It is a very nice guilloche dial and markers and would be worth pairing up with a correct period case (pre-1957).

 

Indeed, it's held in place with a brass spacer ring...

 

The C-case wasn't released by Omega until December of 1964.

Somebody put that dial and movement into a generic case. My guess is the original case was gold and it was sold for melt value.

 

Yes, good hypothesis. There were some Tresor 18k Omegas with the cal 283 (case ref 2686, for example). So the case would have been rose gold, as the hands and hour markers appear to be in these photos. The dark deed may have been done back at some point when gold prices were very high.

 

I think that dial alone is worth the attempt at getting a correct case for it!

The dark deeds have been active for quite some time. Many nice movements and dials for sale caused by silly gold miners.
I have a 352RG Chronometer for sale that have suffered the same (ill) faith. Should have been solid 18K OT2520, but now sits in a ST2576.

I would suggest to do some detective work on what cases was used for a 283 movement. The OVD allows you to search by caliber. I am quite sure a saved search on eBay with these references may land you a decent case.
If it had been a more expensive movement, it could be an idea to get an extract from Omega based on your movement number as this would give you the correct case reference for it.

Happy Hunting!

 

Not in gold, but this one may clean up nicely?
http://www.ebay.co.uk/itm/VINTAGE-O...230839130?pt=Wristwatches&hash=item27de27415aPurchases made through these links may earn this site a commission from the eBay Partner Network

Edit: Not the movement and dial, but the case it self paired with your own movement and lovely dial!

 

Shhh! Not so loud, I already have this on my list! Wish me luck.

 

Sorry, I completely agree with you and everyone else on the first watch. I was questioning the eBay watch you linked to which looked ok to me.

 

Went for $142!

 

A bit high, but it was actually not a bad case. I am sure that plenty more will show up!

 

I'm hoping so....