Jaw
6177
Some consolidated info of the pre-master 1990-1996 Geographic
(The beautiful Geographic, although the current Master Geographic aesthetic is more balance, the retro look is in some way, charming)
(The Computer Aided Design diagram of the 1990 - 1996 Geographic)
This model of geographic carries the reference 169.xxx.xx produced betweeb 1990 to 1996.
(In this model, the crown A must be in position 0, i.e. fully in before the city disc should be adjusted by crown B, instruction manual warned of possible movement damage if instruction is not complied - modern Master Geographic and Compressor geogaphic have no such restriction)
(The technical specification scanned from original JLC archived documents)
(Dial view of the calibre 929)
(Rotor view of calibre 929)
Some technical information:
Mechanical Basic Calibre 929 (modified from basic cal 889.1)
Hour, Minute, and an indirect sweepseconds
2nd. Time zone, hour and minute
24 hr indicator
Power Reserve indicator
Date
Date correction through 2 o?clock button
Time setting crown
Stop seconds
Correction of the time zone with the crown in position 2
Selfwinding pivoting on ball bearing
Stud support with shock-absorber and micro regulator
36 jewels
28800 vibration per hour
External total diameter 26.6mm
Overall thickness 4.85mm
Case consists of more than 300 components
city disc and 10 o'clock position is directly linked.
Jaw
