PRIM 66

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11 1/2”’ | Hand Wind | Swiss Lever | Sweeping Seconds |

Remarks:

  • Over the course of time, the caliber 66 was built in various 66.x variants, which differ in some design features (see extra picture)
  • According to a personal e-mail from PRIM, the caliber 66.2 never went into production. They were supposed to have a riveted balance instead of the pressed one
  • The movement shown here has a 3-arm balance wheel instead of the 2-arm one. It is possible that there were transitions between the 66 and 66.1 variants or that the balance was swapped
  • As caliber PRIM 68 also available with date

 

  • Listing ID: 2207
  • Manufacturer / Brand: PRIM
  • Caliber: 66
  • Size: 11 1/2''' (25.7 mm) (11''' according to manufacturer)
  • Shape: Round
  • Winding: Manual (Crown)
  • Hand Setting: Crown
  • Seconds Hand: Sweeping seconds (central seconds)
  • Escapement: Lever (Swiss, English, Glashütte)
  • Date & Day: None
  • Jewels: 17
  • Setting Lever Screw/Pin Position: Right
  • Balance Position: Bottom (120 - 240°)
  • Shock Protection: Incabloc
  • Beats per hour: 18,000
  • Balance Type: Gold-plated Nickel?
  • Power Reserve: Unknown
  • Production Period: 1965 - 1993 (all variants of the 66.x caliber)
  • Identification: Marking 66 under the balance wheel
  • External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-40#post-5218835
  • Country: Czech Republic
  • Contributor ©: Uhrforum.de member Badener (Andreas Kelz)

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