I think there is something not right with the caseback, specifically the 'waterproof' engraving.
http://www.ebay.com/itm/Vintage-Ome...047098?hash=item21207df7ba:g:jNMAAOSw3v5Yo22hPurchases made through these links may earn this site a commission from the eBay Partner Network

 

Service (luminova) dial and hands, mid case and back look like service items also, bezel looks like a fake to me.

Not much to like, movement is the correct ref for the case.

 

Is it a Watchco?

 

Yes, looks like it, with a fake bezel made to look aged.

 

A very rare fake bezel...

 

.... or maybe even more fake parts, I'm not sure about that dial. Don't like the serifs.

 

Mid case and case back are very close, but still slightly different from genuine vintage or watchco. Add to that the non-genuine bezel (rare type), the whole case is counterfeit. The rest is OK.