Non-Magnetic Watch Co. Pocket Watch: Serial Number 51848 (Grade 74)

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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/non-magnetic-watch-co/51848

Access Date: December 19, 2024

Due to the lack of existing factory records, our Non-Magnetic Watch Co. database has been reconstructed using observations of known watches.
As a result, the information may contain inaccuracies. Please let us know if you have details that can improve the database.

From the American Horology Archive:

Non-Magnetic Watch Co.

Grade: 74

Manufacturer:	Non-Magnetic Watch Co.
Manufacturer Location:	Geneva, Switzerland and USA
Movement Serial Number:	51848
Grade:	74
Model:	1
Estimated Production Year:	1887
Run Quantity:	55
Grade/Model Run:	1 of 11
Grade/Model Total Production:	3,555
Variant Est. Production:	2,355 (16S-M1-15J-HNL)
Size:	16s
Jewels:	15j
Jewel Material:	Ruby
Jewel Setting:	Burnished Jewels
Movement Configuration:	Hunting
Movement Finish:	Nickel
Movement Inlay Color:	Gilt
Movement Setting:	Lever
Plate:	3/4 Plate
Balance Type:	Expansion
Regulator:	Reed
Hairspring:	Non-magnetic
Standard Dial Type:	Single-Sunk
Adjusted:	Yes
Adjusted to Position:	No
Adjusted to Temperature:	Yes
Adjusted to Isochronism:	Yes
U.S. Patents:	359093, 367158, D18722
Movement Markings:	Geneva Nonmagnetic Watch Co Ld New York Paillard's Patent Balance and Spiral
Case:	Various
Run ID:	6.74G1.16S2.161M2.H2.L2.15J1
Database Version:	v52.515
Advanced Metrics
PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration	7.09
PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration	78.14
Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration	2.962%
Registry Population: Scoped for This Run Only	1 (1.82%)
Research Note: "Button Collar" Hairspring Stud, Burnished Jewels

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Production Metrics Tree: Grade 74

Target Profile: 16S-M1-15J-HNL-ATI

Non-Magnetic Watch Co. Grade 74 (All Variations): 3,555 ETP
16S: 3,555 100.00% 16s, Grade 74
16S-M1: 3,555 100.00% 16s, Grade 74, Model 1
16S-M1-15J: 3,555 100.00% 16s, Grade 74, Model 1, 15 Jewels
16S-M1-15J-HNL: 2,355 66.24% 16s, Grade 74, Model 1, 15 Jewels, Hunting/Lever/Nickel	Other: 1,200 Other Configs or Unclassified
16S-M1-15J-HNL-ATI: 2,355 66.24%

Population Registry for This Run

	Image	Serial Number	Run Position	Primary Identification Method	Discovery Date
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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.