One of my Hong Kong watch friends always dismissed my penchant for Omegas by saying "Too many limited editions. Its impossible to keep up!" So it made me think, what would be a complete set, for me. I decided it was pre -78 watches. But even this has its problems. Because at first I thought it would be just seven watches: 2915 2998 105.002 105.003 105.012 145.012 145.022 This overlooks the sub references, and the variations in the 145.022's. But then there are two limited editions that I know of: The Apollo Soyuz, with large pushers and a symbol on the dial, there is an excellent guide to it here: http://issuu.com/mstanga/docs/apollo_soyuz_uk and the 18kt yellow gold Astronauts watch, see here: http://www.watchcarefully.com/articles/speedmaster.html So nine. ? But most references have numerous sub references: http://speedmaster101.com/blog/reference-table-expanded-edition/ (I tried to put the table into the post) So there are a total of 29 versions of the steel references. Plus the Soyuz. And the Gold. So that makes 31 pieces. Would 31 pieces be complete? Well then we have the special dials: The blue sunburst, at least three racing dials, and the radial dial. @doctor steel showed a good selection in his thread here https://omegaforums.net/threads/speedmaster-145012-67-racing-dial.24756/#post-273746 So you can see why I limit my interest to pre 1978! My question to you all is, what is your idea of a complete speedmaster collection?