Pocket Watch Database

We noticed that you entered a relatively short serial number.
"7920" 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:

Newark Watch Co.
Private Label(s) in Run:

W.H. Calhoun - Newark, N.J.

What is a Private Label?
Manufacturer: Newark Watch Co. Question Mark
Manufacturer Location: Newark, New Jersey Question Mark
Movement Serial Number: 7920 Question Mark
Model: 2 Question Mark
Estimated Production Year: 1869 Question Mark
Size: 18s Question Mark
Jewels: 15j Question Mark
Jewel Setting: Screw-Set Question Mark
Movement Configuration: Adaptable Question Mark
Movement Finish: Gilt Question Mark
Movement Setting: Key Question Mark
Plate: Full Plate Question Mark
Regulator: Plain Out Question Mark
Hairspring: Flat Question Mark
Movement Markings: W.H. Calhoun
Newark, N.J.
Patent
Full Jewel'd
Case: Various Question Mark
Run ID: 32.G5.18S23.182M11.E11.K10.15J13 Question Mark
Database Version: v52.431 Question Mark
Registry Population:
Scoped for This Run Only
1 (3.33%) Question Mark

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Verification Reports for this Run

There are currently no verifications for this range.