Pocket Watch Database
Access Date: September 24, 2023
"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.
|Manufacturer:||Lancaster Watch Co.|
|Manufacturer Location:||Lancaster, Pennsylvania|
|Movement Serial Number:||5181|
|Estimated Production Year:||1879|
|Grade/Model Run:||2 of 5|
|Grade/Model Total Production:||2,200|
|Variant Est. Production:||1,100 (18S-M1-15J-AGK-ATI)|
|Adjusted to Temperature:||Yes|
|Adjusted to Isochronism:||Yes|
Click In Out
|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:||13 (1.86%)|
Research Note: #5180: Bitner Regulator. #5054, #5180, #4689, #4975, #4760, #4809, #4676, #5060,#5181: Marked "Adjusted"
Production Metrics Tree: Grade Keystone
Target Profile: 18S-M1-15J-AGK-ATI-NO. 7
|Lancaster Watch Co. Grade Keystone (All Variations): 6,100 ETP|
|18S: 6,100 100.00%
18s, Grade Keystone
|18S-M1: 2,200 36.07%
18s, Grade Keystone, Model 1
Other Models or Unclassified
|18S-M1-15J: 2,200 36.07%
18s, Grade Keystone, Model 1, 15 Jewels
|18S-M1-15J-AGK: 2,200 36.07%
18s, Grade Keystone, Model 1, 15 Jewels, Adaptable/Key/Gilt
|18S-M1-15J-AGK-ATI: 1,100 18.03%||Other: 1,100
Other Adjustments or Unclassified
|18S-M1-15J-AGK-ATI-NO. 7: 1,100 18.03%|
Population Registry for This Run
|Image||Serial Number||Run Position||Primary Identification Method||Discovery Date|
There are 13 watches in the population registry for this run with 7 images.
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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 348 · February 27, 2023
Serial Number 5181 was reported as accurate.