Pocket Watch Database

We noticed that you entered a relatively short serial number.
"5181" 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:
Lancaster Watch Co. Grade Keystone Pocket Watch

Lancaster Watch Co.

Grade: Keystone

Manufacturer: Lancaster Watch Co.
Manufacturer Location: Lancaster, Pennsylvania
Movement Serial Number: 5181
Grade: Keystone
Variation: No. 7
Model: 1
Estimated Production Year: 1879
Run Quantity: 700
Grade/Model Run: 2 of 5
Grade/Model Total Production: 2,200
Variant Est. Production: 1,100 (18S-M1-15J-AGK-ATI)
Size: 18s
Jewels: 15j
Movement Configuration: Adaptable
Movement Finish: Gilt
Movement Setting: Key
Plate: 3/4 Plate
Balance Type: Expansion
Train: Quick
Regulator: Mixed
Adjusted: Yes
Adjusted to Temperature: Yes
Adjusted to Isochronism: Yes
Movement Markings: Keystone
Lancaster, Pa.
Safety Pinion
Click In Out
Case: Various
Run ID: 7.G2.18S5.181M2.A2.K2.15J2
Database Version: v52.303
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
Registry Population: 14 (2.00%)
Research Note: #5180: Bitner Regulator. #5054, #5180, #4689, #4975, #4760, #4809, #4676, #5060,#5181: Marked "Adjusted"

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Verification Reports for this Run

The following reports have been graciously submitted by dedicated members in reference to this production run. These reports are useful to verify data and track inaccuracies that require further research. Please note that reports may contain inaccurate information or assumptions that must be dilligently considered with other available sources.

nicnic Supporter 391 ยท February 27, 2023

Serial Number 5181 was reported as accurate.

Lancaster Watch Co. Grade Keystone Pocket Watch