Ultra 904

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10 1/2”’ | Hand Wind | Swiss Lever | Direct Sweeping Seconds |

Remarks:

  • The Ultra 904 has some visual similarities with the French Parrenin 90, but is not identical to it

 

  • Listing ID: 2789
  • Manufacturer / Brand: Ultra
  • Caliber: 904
  • Size in French Lignes: 10 1/2'''
  • Shape: Round
  • Winding: Manual (Crown)
  • Hands Setting: Crown
  • Seconds Hand: Sweeping seconds (central seconds)
  • Escapement: Lever (Swiss, English, Glashütte)
  • Date, Day, Month...: None
  • Jewels: 17
  • Setting Lever Screw/Pin Position: Left
  • Balance Position: Bottom (120 - 240°)
  • Shock Protection: Incabloc
  • Beats per hour: 18,000
  • Balance Type: Mono-/Bimetallic screw balance with Breguet hairspring | Glucydur | Nickel | Brass
  • Power Reserve: Unknown
  • Production Period: Unknown, probably around 1955
  • Identification: Ratchet wheel marked with ULTRA 904. Original data sheet available.
  • External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-33#post-4138736
  • Country: France
  • Contributor ©: Uhrforum.de member Badener (Andreas Kelz)

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