Pocket Watch Database

We noticed that you entered a relatively short serial number.
"9920" 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.

Grade: Robert Fellows

Manufacturer: Newark Watch Co. Question Mark
Manufacturer Location: Newark, New Jersey Question Mark
Movement Serial Number: 9920 Question Mark
Grade: Robert Fellows Question Mark
Model: 2 Question Mark
Estimated Production Year: 1870 Question Mark
Run Quantity: 50 Question Mark
Grade/Model Run: 2 of 6 Question Mark
Grade/Model Total Production: 550 Question Mark
Variant Est. Production: 50 (18S-M2-15J-EGK-A) 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
Adjusted: Yes Question Mark
Movement Markings: Robert Fellows
Patent
Newark, N.J.
Adjusted
Case: Various Question Mark
Run ID: 56.G2.18S37.182M24.E24.K23.15J19 Question Mark
Database Version: v52.591 Question Mark
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
1.65 Question Mark
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
90.00 Question Mark
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
14.212% Question Mark
Registry Population:
Scoped for This Run Only
1 (2.00%) Question Mark

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Verification Reports for this Run

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