Silena 10 1/2''' = Felsa 71 old
133 views
10 1/2”’ | Hand Wind | Swiss Lever | No Seconds |
Remarks:
- Base is an old version of the Felsa 71 without setting lever spring
- Cover plate made of metal -> no jewel bearings underneath!
- Here the patent refers to the shock protection, which is integrated into the corrector; this is only effective axially
- Listing ID: 1491
- Manufacturer / Brand: Felsa / Silena
- Caliber: Silena 10 1/2''' = Felsa 71
- Size in French Lignes: 10 1/2'''
- Size range mm largest diameter: 22 - 31 mm
- Shape: Round
- Winding: Manual (Crown)
- Hands Setting: Crown
- Seconds Hand: None
- Escapement: Lever (Swiss, English, Glashütte)
- Date, Day, Month...: None
- Jewels: 7
- Setting Lever Screw/Pin Position: Left
- Balance Position: Bottom (120 - 240°)
- Shock Protection: Silena (axially effective only)
- Beats per hour: 18,000
- Balance Type: Monometallic screw balance
- Power Reserve: Unknown
- Production Period: Unknown, probably before 1928
- Identification: Patent number 102795 engraved on the ratchet wheel, referring to the Swiss patent CH102795 from 1924 by Koch/Silena: „Rückervorrichtung für Taschenuhren“ (Corrector device for pocket watches). The newer version with setting lever spring is listed in the Ebauches SA catalog from 1928.
- External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-45#post-6027262
- Country: Switzerland
- Contributor ©: Uhrforum.de member Badener (Andreas Kelz)
Before being published, your comment will be checked by a moderator. Therefore you will not see it immediately!