I'm confused on this watch, the case says M6 which I was told means 1966 but the movement is 11AFAC which from what I gathered was used from 1959-1963. Any help would be greatly appreciated.
On the bracelet. Based on period ads, showing your watch, the band is indeed a replacement. Original band would have been a "scissor" expansion style matching the ad.
Speidel patented and started producing "Twist-O-Flex" bands in either 1958 or 1959. Bulova did use them, but I don't think this early. Here is a circa 1962 box from my collection showing a Speidel banner ribbon and also a hang tag, so they did indeed use them starting in the early 1960's.
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In reply to On the bracelet. Based on… by neetstuf-4-u
In reply to On the bracelet. Based on… by neetstuf-4-u