Felsa Caliber 693

Felsa Caliber 693

Brand Felsa S.A. (via Ebauches S.A.)
Caliber Number 693
Base Caliber
690
Movement Type Automatic, self-winding mechanical
Lignes
11.5”’
Diameter
26mm
Jewels 17
Power Reserve Unconfirmed
Vibrations Per Hour 21,600 vph
Lift Angle
52 (unconfirmed)
Hands Count
4
Functions Central hours, central minutes, central sweeping seconds; central date hand; day of the week at 11:00; month at 1:00; moonphase at 6:00
Country of Manufacture Switzerland, Swiss made
Known Watches
Used by Breitling, Record, etc. (Add your watch in the comments below…)

The Felsa caliber 693 (not to be confused with the Zenith 693) is an automatic triple-date moonphase movement with 17 jewels. This caliber was produced by Ebauches S.A. in Neuchatel, Switzerland in the 1950s.

Setting the Calendar:

There are 4 pushers, with 2 on each side of the case. Here is what they control:

  • Pusher at 10:00 – Day of the week
  • Pusher at 2:00 – Month
  • Pusher at 4:00 – Date hand
  • Pusher at 8:00 – Moonphase position

Note: Do not set the calendar between the hours of 10PM and 2AM. This is when the automatic advancing or jumping of the calendar takes place and the movement could become damaged if the advancement is forced while the automatic system is engaged.

Caliber 693 VS 690:

There is a similar caliber 690 with the main difference being that the 693 adds a calendar and moonphase complication. Most of the parts are interchangeable between these two calibers, with exception to a few parts such as the main plate, pallet cock, center wheel, cannon pinion, and sweep seconds pinion.

Caliber Commentary:

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.” -From an article titled “Five Vintage Hearts”

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.

Examples of watches with this movement:

Pictured below is a triple-date Felsa caliber 693 chronometer movement found in an 18k moonphase calendar chronometer by Record Watch Co. The rotor is signed by Favre-Leuba Chronometer Co. This example is from circa 1960’s.

Felsa Caliber 693 Felsa Caliber 693 Felsa Caliber 693

Additional Resources:

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