Felsa Caliber 693
|Vibrations Per Hour||21,600|
|Functions||Day, date, month, moonphase|
|Country of Manufacture||Switzerland|
|Known Models||Used by Breitling, Record, etc|
This triple-date Felsa caliber 693 chronometer movement was found in an 18k moonphase calendar chronometer by Record Watch Co. The movement is signed by Favre-Leuba Chronometer Co. This example is from circa 1960’s.
In an article by iW Magazine:
The 693 added the calendar with day of the week and month in two small windows above the center and day of the month around the perimeter of the dial with individual recessed pushers for day, date, month and moon phase—Felsa’s most complicated movement.
In a post by a user on WatchNet:
The calibre 693 was part of the second generation Bidynator automatics produced by Felsa, starting in the late 1940’s, and was the most complicated movement of this series. The Bidynator series was the first automatic movement to wind in both directions, and represented a milestone in the development of the automatic wristwatch.
- Read more: Favre-Leuba on wikipedia