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 in French Lignes: 10 1/2'''
- Size range mm largest diameter: 22 - 31 mm
- 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: 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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