I went on the same quest a while back, trying to get as close as I could to a 1957 Seamaster. I eventually found this little beaut at a local coin dealer. I checked the inside and all the numbers added up to a likely legit vintage watch. The movement (Cal.520) was only produced between 1957 and 1959. The serial number and the style of the medallion on the back suggest that it was finally put together for sale in 1958, 1959, or maybe even 1960. Nailing down a specific year could be difficult, but if you found one of these (Omega ref. # 14722) you'd be about as close to what you're looking for as you can get. I paid about $600 as I recall. Good luck!
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