Lancaster Watch Co. Pocket Watch: Serial Number 4307 (Grade Keystone)

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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/lancaster-watch-co/4307

Access Date: December 26, 2024

We noticed that you entered a relatively short serial number.
"4307" 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:	4307
Grade:	Keystone
Variation:	No. 7
Model:	1
Estimated Production Year:	1879
Run Quantity:	500
Grade/Model Run:	1 of 5
Grade/Model Total Production:	2,200
Variant Est. Production:	1,100 (18S-M1-15J-AGK-U)
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:	No
Railroad Grade:	No
Movement Markings:	Keystone Lancaster, Pa. Safety Pinion Click In Out
Case:	Various
Run ID:	6.G1.18S4.181M1.A1.K1.15J1
Database Version:	v52.528
Advanced Metrics
PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration	6.62
PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration	48.78
Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration	0.967%
Registry Population: Scoped for This Run Only	8 (1.60%)
Research Note: #4381: Sepcial Escapement with Double Escape Wheel, Curved Plate Profile. #4142, #4410: Not Marked "Adjusted." #4226: Marked "Adjusted"

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Production Metrics Tree: Grade Keystone

Target Profile: 18S-M1-15J-AGK-U-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: 3,900 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-U: 1,100 18.03%	Other: 1,100 Other Adjustments or Unclassified
18S-M1-15J-AGK-U-NO. 7: 1,100 18.03%

Population Registry for This Run

	Image	Serial Number	Run Position	Primary Identification Method	Discovery Date
There are 8 watches in the population registry for this run with 4 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.