Movement details – automatic chronograph, 60s, 30min, 12h, cam switched,
sub second, f = 28800 A/h, power reserve 46h, 17 JEWELS, hack feature (2 type rotor, 2 + 1)

http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&ae&2uswk&Valjoux_7750

7750_br_017750_br_027750_br_037750_br_04

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