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From the American Horology Archive:
E. Howard Watch Co. (Keystone)

Grade: Series 3

Manufacturer: E. Howard Watch Co. (Keystone) ?
Manufacturer Location: Waltham, Massachusetts ?
Movement Serial Number: 908035 ?
Grade: Series 3 ?
Model: 1905 ?
Estimated Production Year: 1906 ?
Run Quantity: 2,000 ?
Grade/Model Run: 35 of 39 ?
Grade/Model Total Production: 49,390 ?
Variant Est. Production: 26,840 (16S-M1905-H) ?
Size: 16s ?
Jewels: 17j ?
Jewel Material: Ruby & Sapphire ?
Jewel Setting: Gold Settings (Screw-Set) ?
Movement Configuration: Hunting ?
Movement Finish: Nickel ?
Finish Pattern: Circular ?
Movement Setting: Pendant ?
Plate: 3/4 Plate ?
Regulator: Reed ?
Hairspring: Breguet ?
Pallet Jewel Material: Sapphire ?
Standard Dial Type: Single-Sunk ?
Adjusted: Yes ?
Adjusted to Position: Yes ?
Adjusted # of Positions: 3 ?
Adjusted to Temperature: Yes ?
Adjusted to Isochronism: Yes ?
Dial Feet Locations: 10.7, 24.3, 48.9 ?
Movement Markings: E. Howard Watch Co. Boston U.S.A. Adjusted 17 Jewels ?
Case: Various ?
Run ID: 46.G15.16S22.161905M21.H10.P38.17J25 ?
Database Version: v52.978 ?
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Registry Population: Scoped for This Run Only: 40 (2.00%) ?
$ Estimated Value (12 Month Change): +7.79% Analyzing 316 Sales ?