Hi everybody, this is my first thread here, and I would like to share some information I collected over the years about Seamaster 300 165024 and 166024 bezels: EDIT: There are apparently many F-type (https://omegaforums.net/threads/rn-sm300-f-s-phillips-auction-geneva-13-14th-may.56782/#post-701593): - F1 with a pointed triangle Produced as early as 1967 and 24M serial numbers but very rare compared to C-D-E-types. - F2 with a rounded triangle and bolder numbers. Most common from 1969 and as a replacement in the 70ies and 80ies. - F3 similar to F1 but without minute markers (all black but triangle and numbers). Rarest. - F4 similar to F1 with a broader triangle Extremely rare, mostly on Royal Navy / Ministry of Defence. - F5 a blue version similar to 166.073 bezel insert. Here is a F1 F2 comparison (both bezels taken on the same picture, same scale): EDIT: Here are the 4 most common fakes: