IWC 73 H4

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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: 17'''
  • Shape: Round
  • Winding: Manual (Crown)
  • Hand Setting: Crown
  • Seconds Hand: Small seconds
  • Escapement: Lever (Swiss, English, Glashütte)
  • Date & Day: 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)

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