Hamilton Model 1 Grade 900
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12 size (approx. 17 3/4”’) | Hand Wind | Swiss Lever | Small Seconds |
Remarks:
- Negative crown winding
- Swan-neck fine regulator
- Motor barrel
- train wheels ( fourth wheel, third wheel, center wheel, minute wheel) and chatons made of gold
- First 12 size movement from Hamilton
- Listing ID: 634
- Manufacturer / Brand: Hamilton
- Caliber: Model 1 Grade 900
- Size: 12 size (approx. 17 3/4''')
- Shape: Round
- Winding: Manual (Crown)
- Hand Setting: Crown
- Seconds Hand: Small seconds
- Escapement: Lever (Swiss, English, Glashütte)
- Date & Day: None
- Jewels: 19
- Setting Lever Screw/Pin Position: None (Negative Winding)
- Balance Position: Left (240 - 360°)
- Shock Protection: None
- Beats per hour: 18,000
- Balance Type: Bimetallic screw balance with Breguet hairspring
- Power Reserve: Unknown
- Production Period: 1910 – 1923 (24.700 pieces)
- Identification: Movement marked Hamilton. Based on the serial number on this website: https://pocketwatchdatabase.com/search/result/hamilton/1752940
- External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-57#post-7928559
- External Link 2: https://pocketwatchdatabase.com/search/result/hamilton/1752940
- Country: U. S. A.
- Contributor ©: Uhrforum.de member Badener (Andreas Kelz)
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