The Olympia or Olumpic was made as a special version, for the Olympics in 1960.
Longines did the timing for the Olympic Games in Squaw Valley.
The combination of winter and summer activities on the blue enameled and gold medallion on the back are interesting.
They made this version for the Italian and Spanish market to celebrate the summer Olympics in 1960 in Rome, Italy. (The Olympic in Rome was timed by Omega)
The case is in 18k gold, with case reference 6957.
Unfortunately this watch has a refinished dial, and the hands are painted black.
The original dial can be seen in this post on http://omegaforums.net/
It was invoiced on 29th February 1960 to Messrs. Girod, who was the Longines agent in Spain.
There is also a version in stainless steel, with the same medallion on the back.
This steel case version has the reference 6958
Not exactly mint condition, but it has the original dial, but I am not sure if the hands are.