mac_omega
·This is an excellent thread, thanks @PlainVanilla for the diligent work.
I'll try to contibute with an example of the non-mainstream Emir-of-Bahrain watches. This is a 166.020 in pink gold with a 7077 bracelet dated 65-1 (with 5 double expandable links). Case manufacturer is, as expected, Serva S.A. I've included the EoA, which is interesting, because it mentions the bracelet and the metal designation BB which apparently stands for 18k pink gold. (So I think the metal code BG mentioned in the main post could indeed stand for 9kt yellow gold, as explained in the table from the Omegamania catalogue posted by @gatorcpa in this thread).
As nobody did it yet I call DIBS!