This franken is getting a gen new Swiss 25j 7750 rather than a cal 13. Because all breitling do is engrave the rotor I didn't see the point of paying a premium for a cal 13 compared to what I was able to pick the standard eta up for. In fact a used 17j cal 13 would have been double the price of this brand new 25j movement.
Compare it side by side with your gen bezel and you'll see what I mean about instant tell unless you really lucked out with your v2. It's the only way I can spot a v2 with a gen dial and strap/bracelet. Of course without the watch in hand and my reading glasses on I could never call out a v2 franken and so I can live without a gen bezel (the click is another tell).
That's pretty much what i thought of the cal13 and 7750. I am keeping my eyes open for the less known 7750 25j based watches such as jacques lemans, philip watch, renato...on ebay. they very often go for something like 200 GBP. do you know any other good -cheap source of 7750 25j movements?
Another question, is modern cal 13b having the same datefont as normal 7750 or they changed it a bit?
bezel click is obviously different between v2 and gen but also gens can sometimes have different bezel click sounds related to the age of watch, exposure to water and so on. straps wise i got a gen pro 1 bracelet, gen pro diver ( on the way from the US) and a bob leather strap with gen breit buckle so i should be ok in terms of straps. i quite like the SA on PAM style straps as well

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I'll try to photograph both bezels v2 and gen and we'll see how the situation is .
I am seriously thinking about the gluing possibilities for the 2 part v3 case. there are extremely serious glues for metal that should create good sealing. will post up if i manage to get to an answer.