E. Howard Watch Co. (Keystone) Pocket Watch: Serial Number 859495 (Grade Series 4)

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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/859495/link

Access Date: April 19, 2024

Due to the lack of existing factory records, our E. Howard Watch Co. (Keystone) 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:

E. Howard Watch Co. (Keystone)

Grade: Series 4

Manufacturer:	E. Howard Watch Co. (Keystone)
Manufacturer Location:	Waltham, Massachusetts
Movement Serial Number:	859495
Grade:	Series 4
Model:	1905
Estimated Production Year:	1905
Run Quantity:	480
Grade/Model Run:	1 of 22
Grade/Model Total Production:	16,610
Variant Est. Production:	8,980 (16S-M1905-17J-ONP)
Size:	16s
Jewels:	17j
Jewel Material:	Ruby & Sapphire
Jewel Setting:	Gold Settings (Screw-Set)
Movement Configuration:	Openface
Movement Finish:	Nickel
Finish Pattern:	Checkerboard
Movement Setting:	Pendant
Plate:	3/4 Plate
Double Roller:	Yes
Regulator:	Reed
Hairspring:	Breguet
Pallet Jewel Material:	Sapphire
Standard Dial Type:	Double-Sunk
Adjusted:	Yes
Adjusted to Position:	Yes
Adjusted # of Positions:	5
Adjusted to Temperature:	Yes
Adjusted to Isochronism:	Yes
Railroad Grade:	Yes
Dial Feet Locations:	10.7, 24.3, 48.9
U.S. Patents:	781263, 796162, 886387, 900183, 992013, 971496, 978612, 981667
Case:	Various
Run ID:	23.G1.16S11.161905M11.O17.P22.17J16
Database Version:	v52.235
Advanced Metrics
PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration	39.38
PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration	130.83
Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration	2.531%
Registry Population:	17 (3.54%)
$ Estimated Value (12 Month Change):	-14.01% Analyzing 69 Sales
Research Note: Mixed Run: #859040, #859168, #859193, and #859410 Reported as Featuring Checkerboard Pattern (Some Marked A3P). #859495: Verified as featuring the checkerboard damaskeening pattern consistent with the Grade 4 classification, marked "Adjusted."

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Production Metrics Tree: Grade Series 4

Target Profile: 16S-M1905-17J-ONP-A5PTI

E. Howard Watch Co. (Keystone) Grade Series 4 (All Variations): 16,610 ETP
16S: 16,610 100.00% 16s, Grade Series 4
16S-M1905: 16,610 100.00% 16s, Grade Series 4, Model 1905
16S-M1905-17J: 16,610 100.00% 16s, Grade Series 4, Model 1905, 17 Jewels
16S-M1905-17J-ONP: 8,980 54.06% 16s, Grade Series 4, Model 1905, 17 Jewels, Openface/Pendant/Nickel	Other: 7,630 Other Configs or Unclassified
16S-M1905-17J-ONP-A5PTI: 8,980 54.06%

Population Registry for This Run

	Image	Serial Number	Run Position	Primary Identification Method	Discovery Date
There are 17 watches in the population registry for this run with 1 image. 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.

PHIL1199 Supporter 958 · October 15, 2021

Serial Number 859495 was reported as accurate.

rmwatchandclock Supporter 366 · September 7, 2021

Serial Number 859495 was reported as inaccurate.

Note: Serial number 859495 I believe is a series 9, not
series 2. Photos have been uploaded to my
collection.

Curator Response: Thanks for the report. This one is a bit too early to be a Grade 9, but it is consistent with the Grade 4 classification that preceeded the Grade 9. I have refined the runs a bit based on recent observations, defining this run as the first Grade 4 production.

Changes since this report was submitted:

Grade changed from Series 2 to Series 4