: As you can see it is just the case and dial. I
: bought it a whim really (for $30) and I'm
: not sure what else I'll need. Obviously I'll
: need a movement and saphire. What else do i
: need?
You'll need LOTS of other parts. Crown, stem, bezel, gaskets, seals, spacer rings, crystal -- and a lot of professional labor to find the parts, then assemble them all into a working timepiece. A big problem with trying to cheap out using non-OMEGA parts would be the increased labor cost of a watchmaker searching for cheaper parts that would fit that case.
Also understand that "prototype" is a term often used in vintage watch sales to try to pacify buyers with an 'explanation' to cover oddities in pieces of bogus, questionable or unknown origins. Manufacturers like OMEGA do not let their prototypes get out to the public. I suspect the true origin is merely that the case, dial and hands were replacement parts ordered it for a customer, who then decided not to restore his watch when he saw what the total expense would be.
While it sounds neat to try to fix that up into being a functioning watch, it is actually totally impractical to do so -- especially if you are not a watchmaker yourself and have to pay someone to find workable parts and assemble them for you. You would likely go to a couple of hundred dollars of parts and labor expense that would leave you with a Frankenstein watch of random parts, that in the end will probably be worth about $30.
