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I got this by entering in the serial number- not sure if it runs, I wound it but the second hand didn't move.

Note that the crystal is missing.

FROM THE AMERICAN HOROLOGY ARCHIVE:

Hamilton Watch Co.

Grade: 910

Only Sold Cased by Hamilton.

Manufacturer:Hamilton

Manufacturer Location:Lancaster, Pennsylvania

Movement Serial Number:1878365

Grade:910

Model:1

Estimated Production Year:1921

Run Quantity:1,200

Grade/Model Run:22 of 37

Grade/Model Total Production:153,800

Size:12s

Jewels:17j

Movement Configuration:Openface

Movement Finish:Nickel

Movement Setting:Pendant

Plate:3/4 Plate

Regulator:Reed

Hairspring:Breguet

Adjusted:Yes

Adjusted to Position:No

Adjusted to Temperature:No

Railroad Grade:No

Dial Feet Locations:10.5, 38.5, 56.0

Data Research:1953 Hamilton Serial List

Case:Various

Run ID:2113.910G22.12S57.121M57.O1516.P603.17J1275

Database Version:v52.246

PWDB Absolute Rarity Index:

Scoped for Grade/Size/Model/Configuration463.05

PWDB Relative Rarity Index:

Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration203.17

Share of Production:

Share within Manufacturer - Scoped for Grade/Size/Model/Configuration1.443%

Registry Population:3 (0.25%)

$ Estimated Value (12 Month Change): 19.80% Analyzing 847 Sales