Speedmaster is very special absolutely as the firstwatch on themoon. Thereforethere is averyloudnickname for this watch-“moon watch”. Thenamefor thesuper-exclusive watch shows the unique character of it.
Speedmaster is actually a series of Omega Speedmaster Series Replica Watches. Those who named as moon watches are just Speedmaster professional manual movement chronograph models, which is the best known in Omega Speedmaster Series Cheap Copy Watches. Strictly speaking, the real moon watch is only for Omega Ref. St 105.003, Ref. St 105.012 and Ref. St 145.012 the antique Speedmaster, all equipped with the famous Cal.321 movement.
Cal.321 movement is originally from the Lemania Cal. 27 CHRO C12, designed by Albert Piguet and Jaques Reymond, published in 1942. This is the most famous a timepiece in Lemania watches. 27 C12 CHRO refers to the diameter of 27mm, timing function, and 12 hours timing display. It got the name originally from the cooperation between Omega and Lemania R & D project. 27 C12 CHRO movement was later renamed after the Lemania 2310, OMEGA number Cal.321, with a total output of about forty thousand pieces.