Thank you also another question pops in my brain, anyway to know which style was most popular, this or the BOR example back in that era? Any adverts with this example attached to watches of the era?
BOR was by far more popular. Since Omegas were supplied on straps when new and bracelets were sold as accessories at point of sale, it may be hard to find this exact one in an ad.
I can't be for certain, but I believe quite a few of the Japanese sellers have Seamasters with similiar straps. I wasn't sure if they were genuine but am continuously tempted when I see one...