Ahhh! Thankyou William.... I didn't see that???
I shall go to the pub, get on WiFi and investigate.
Just as a matter of interest... with the clutch bridge sitting, easily accessible, up on the top of the 321 movement, Isn't it an easy part to swap over without dismantling the movement? And if so, is there any reason to suspect that those asymmetric bridges you've seen on a -63 are not original? Or is it more likely to have been a parts overlap late in the serial range?
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