Jonathan: You have a case reference 135.041 with a caliber 601. The watch Ashley (dsio) showed above is a 165.041 caliber 552, and the date versions were 166.041 caliber 565. They're the same watch, with the case numbers assigned according to what type of caliber was inside:
First digit: 1 = man's watch
Second digit: 3 = manual wind center seconds, 6 = automatic wind center seconds
Third digit: 5 = water resistant, 6 = water resistant with calendar
aga79: You have a 145.009 with a caliber 865. That watch had something to do with the 1968 Mexican Olympics, but I don't think it was a limited edition or directly marketed as a commemorative edition. I've got a Seamaster Chronostop 145.007 that I wear more often than I admit to on the forums.
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