Smiths 637

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

Remarks:

  • According to Barrie Smiths’ book “Smiths Watches, Pierhead Publications Ltd., 2009”, the movement belongs to the so-called Streamline series
  • Balance bridge instead of balance cock
  • Click riveted
  • Dial screws clamp the dial feet directly with their heads

 

  • Listing ID: 4074
  • Manufacturer / Brand: Smiths
  • Caliber: 637
  • Size: 10 1/2'''
  • 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: Left
  • Balance Position: Bottom (120 - 240°)
  • Shock Protection: KIF Trior
  • Beats per hour: 18,000
  • Balance Type: Nickel
  • Power Reserve: Unknown
  • Production Period: Unknown, probably around 1970. The Streamline movements existed from 1966.
  • Identification: Barrel bridge marked CAL. 637.
  • External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-16#post-2736257
  • Country: United Kingdom
  • Contributor ©: Uhrforum.de member Badener (Andreas Kelz)

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