Pocket Watch Database

We noticed that you entered a relatively short serial number.
"1089" could possibly indicate the grade of the watch and not the serial number of your movement. Serial numbers are usually more than a few digits.
From the American Horology Archive:
Hamilton Grade 933 Pocket Watch Movement

Hamilton Watch Co.

Grade: 933

Manufacturer: Hamilton
Manufacturer Location: Lancaster, Pennsylvania
Movement Serial Number: 1089
Grade: 933
Model: 2
Estimated Production Year: 1894
Run Quantity: 40
Total Production: 650
Size: 18s
Jewels: 16j
Movement Configuration: Hunting
Movement Finish: Nickel
Movement Setting: Lever
Plate: Full Plate
Adjusted: Yes
Railroad Grade: No
Dial Feet Locations: 2.6, 18.0, 38.2
Data Research: 1953 Hamilton Serial List

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Data Verification Reports

1061
Verification Serial Map
1100

Anonymous · July 8, 2019

Serial Number 1061 was reported as accurate.

Anonymous · July 4, 2019

Serial Number 1061 was reported as accurate.

Mobilaero Top Contributor 243 · May 7, 2016

Serial Number 1089 was reported as accurate.

Hamilton Grade 933 Pocket Watch Movement