Lancaster Watch Co. Pocket Watch: Serial Number 4900 (Grade Keystone)

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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/lancaster-watch-co/4900

Access Date: May 09, 2025

We noticed that you entered a relatively short serial number.
"4900" 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

Manufacturer:	Lancaster Watch Co.
Manufacturer Location:	Lancaster, Pennsylvania
Movement Serial Number:	4900
Grade:	Keystone
Variation:	Login to View
Model:	1
Estimated Production Year:	Login to View
Run Quantity:	Login to View
Grade/Model Run:	Login to View
Grade/Model Total Production:	Login to View
Variant Est. Production:	Login to View
Size:	18s
Jewels:	15j
Movement Configuration:	Adaptable
Movement Finish:	Gilt
Movement Setting:	Key
Wind Mechanism:	Key
Plate:	3/4 Plate
Balance Type:	Expansion
Train:	Login to View
Regulator:	Login to View
Adjusted:	Login to View
Adjusted to Temperature:	Login to View
Adjusted to Isochronism:	Login to View
Movement Markings:	Login to View
Case:	Various
Run ID:	7.G2.18S5.181M2.A2.K2.15J2
Database Version:	v52.645
Advanced Metrics
Members Only Data. Login or create a free account to unlock.
Registry Population: Scoped for This Run Only	14 (2.00%)
Research Note: #5180: Bitner Regulator. #5054, #5180, #4689, #4975, #4760, #4809, #4676, #5060,#5181: Marked "Adjusted"

12 Additional Member-Only Data Points Available

The following information is unlocked with a free account:

Variation, Estimated Production Year, Run Quantity, Grade/Model Run, Grade/Model Total Production, Variant Est. Production, Train, Regulator Type, Adjustments, Temperature Adjustments, Isochronism Adjustments, Movement Markings

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Population Registry for This Run

	Image	Serial Number	Run Position	Primary Identification Method	Discovery Date
There are 14 watches in the population registry for this run with 7 images. Create a FREE account or login to view the population registry and add your watch to the registry. Create a Free Account

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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.