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From the American Horology Archive:
ball-hamilton

Grade: 999A

Manufacturer: Ball - Hamilton ?
Movement Serial Number: 586127 ?
Grade: 999A ?
Model: 1 ?
Estimated Production Year: 1908 ?
Run Quantity: 500 ?
Grade/Model Run: 8 of 25 ?
Grade/Model Total Production: 14,000 ?
Size: 18s ?
Jewels: 21j ?
Movement Configuration: Openface ?
Movement Finish: Nickel ?
Finish Pattern: Pinwheel ?
Movement Setting: Lever ?
Plate: Full Plate ?
Double Roller: Yes ?
Regulator: Ball ?
Adjusted: Yes ?
Adjusted # of Positions: 5 ?
Adjusted to Temperature: Yes ?
Railroad Grade: Yes ?
Movement Markings: Official RR Standard 999 The Ball Watch Co. Cleveland. Adjusted 5 Positions Double Roller. 21 Jewels Sapphire Pallets Safety Pinion Trade Mark Patented June 30'96 Pat.Aug.18'96. ?
Case: Various ?
Database Version: v52.978 ?
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Registry Population: Scoped for This Run Only: 5 (1.00%) ?