The so called dot over 90 Tachymeter bezel is/was found on straight lugs Speedies like Ref. CK 2998, 105.002 & 105.003. True or False? Note that I'm trying to (1) understand the Speedmaster models and (2) figure out how not to get scammed when I make my first purchase of one 145-022-67/68. Any help clarifying this would be greatly appreciated! For the Cal. 321 Speedie [including Cal. 861 Ref. 145.022 transition timepieces that's identical[??] to Cal. 321, except Cal. 861 movement] the correct Tachymeter bezel would show a dot located at 70. ??? Please, just need a wee bit o help to the try thoughts straight because this still seems confusing to me. Thanks very much, in advance.