aaronm
2923
No relation to the 240...
Now they're both excellent movements, but this was a JLC base that Patek bought and refined. If I remember the story they could not buy the thinnest version (no date, no seconds) because the development of that was funded by AP(still used as the cal 2120) and VC, so they had exclusive rights to the thinnest of the thin. The 240 was developed by Patek to replace the 28 and really shares very little in the way of design or construction, as far as I can tell....
A
Calibre 28-255 ....Grand ol' daddy of C. 240...
1970's Automatic.....36 jewels ....8 adjustments.....21k rotor edge....with free-sprung gyro-max balance wheel......no idea what the power reserve is.....still in testing.....views??? Size: 28.00mm Frequency: 19,800bph Lift angle: 58 degrees...
No relation to the 240...
Now they're both excellent movements, but this was a JLC base that Patek bought and refined. If I remember the story they could not buy the thinnest version (no date, no seconds) because the development of that was funded by AP(still used as the cal 2120)...