Pocket Watch Database


From the American Horology Archive:
Waltham Grade No. 820 Pocket Watch

American Waltham Watch Co.

Grade: No. 820

Manufacturer: Waltham Question Mark
Manufacturer Location: Waltham, Massachusetts Question Mark
Movement Serial Number: 20518433 Question Mark
Grade: No. 820 Question Mark
Model: 1883 Question Mark
Estimated Production Year: 1916 Question Mark
Run Quantity: 1,000 Question Mark
Grade/Model Run: 210 of 224 Question Mark
Grade/Model Total Production: 413,500 Question Mark
Size: 18s Question Mark
Jewels: 15j Question Mark
Movement Configuration: Openface Question Mark
Movement Finish: Nickel Question Mark
Movement Setting: Pendant Question Mark
Plate: Full Plate Question Mark
Hairspring: Breguet Question Mark
Adjusted: No Question Mark
Railroad Grade: No Question Mark
Case: Various Question Mark
Run ID: 23211.G210.18S12108.181883M3410.O14413.P8306.15J5401 Question Mark
Data Research: 1954 Waltham "Gray Book" List
NAWCC Waltham Serial Digest
Question Mark
Database Version: v52.526 Question Mark
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
874.33 Question Mark
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
795.64 Question Mark
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
0.869% Question Mark
Registry Population:
Scoped for This Run Only
10 (1.00%) Question Mark
$ Estimated Value (12 Month Change): -6.25% Analyzing 1,259 Sales Question Mark

Help Us Help Others By Improving the Database:

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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.


Anonymous · September 28, 2023

Serial Number 20518433 was reported as accurate.

EldritchWatch 26 · September 5, 2023

Serial Number 20518072 was reported as accurate.

pocketwatcher2 2 · July 5, 2022

Serial Number 20518433 was reported as accurate.

pocketwatcher2 2 · July 5, 2022

Serial Number 20518433 was reported as accurate.

Snapper Supporter 148 · November 10, 2021

Serial Number 20518782 was reported as accurate.

Anonymous · December 15, 2020

Serial Number 20518083 was reported as accurate.

Anonymous · May 1, 2019

Serial Number 20518862 was reported as accurate.

Bildeborg 48 · June 7, 2018

Serial Number 20518240 was reported as accurate.

mnadeau93 1 · June 8, 2014

Serial Number 20518376 was reported as accurate.

Chattflash 24 · February 7, 2014

Serial Number 20518426 was reported as accurate.

Waltham Grade No. 820 Pocket Watch