IWC 73 H4
120 views
17”’ | Hand Wind | Swiss Lever | Small Seconds |
Remarks:
- Caliber 73 = Lépine (open face), 74 = Savonnette (hunter)
- Swan-neck fine regulator
- Maltese cross stopwork on the mainspring barrel
- Dial feet are held by steel springs, no screws -> IWC patent CH55231
- Listing ID: 4860
- Manufacturer / Brand: IWC
- Caliber: 73 H4
- Size in French Lignes: 17'''
- Size range mm largest diameter: 31 - 40 mm
- Shape: Round
- Winding: Manual (Crown)
- Hands Setting: Crown
- Seconds Hand: Small seconds
- Escapement: Lever (Swiss, English, Glashütte)
- Date, Day, Month...: None
- Jewels: 16
- Setting Lever Screw/Pin Position: Left
- Balance Position: Right (0 - 120°)
- Shock Protection: None
- Beats per hour: 18,000
- Balance Type: Bimetallic screw balance with Breguet hairspring
- Power Reserve: Unknown
- Production Period: 1913 – 1930 (51.900 pieces)
- Identification: Listed in the Flume K1 catalog (part from 1957) and in the Engelkemper from 1966. Original documents from IWC available.
- External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-4#post-1469319
- 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!