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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/928065
Access Date: June 07, 2023

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 3 Pocket Watch
E. Howard Watch Co. (Keystone) Grade Series 3 Pocket Watch
E. Howard Watch Co. (Keystone)

Grade: Series 3

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 928065
Grade: Series 3
Model: 1905
Estimated Production Year: 1909
Run Quantity: 3,000
Grade/Model Total Production: 61,640
Variant Est. Production: 28,700 (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: Circular
Movement Setting: Pendant
Plate: 3/4 Plate
Regulator: Reed
Hairspring: Breguet
Pallet Jewel Material: Sapphire
Standard Dial Type: Single-Sunk
Adjusted: Yes
Adjusted to Position: Yes
Adjusted # of Positions: 3
Adjusted to Temperature: Yes
Adjusted to Isochronism: Yes
Railroad Grade: No
Dial Feet Locations: 10.7, 24.3, 48.9
U.S. Patents: 781263, 796162, 886387, 900183, 992013, 971496, 978612, 981667
Case: Various
Database Version: v50.869
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration		 83.41
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration		 222.66
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration		 5.630%
Registry Population: 75 (2.50%)
Research Note: #927004: Reported with Checkerboard Pattern. #927824: Reported as Lever-Set. #928968 and #929993: Reported as Hunting instead of Openface.
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Production Metrics Tree: Grade Series 3

Target Profile: 16S-M1905-17J-ONP-A3PTI

E. Howard Watch Co. (Keystone) Grade Series 3 (All Variations): 61,640 ETP
16S: 61,640 100.00%
16s, Grade Series 3
16S-M1905: 61,640 100.00%
16s, Grade Series 3, Model 1905
16S-M1905-17J: 61,640 100.00%
16s, Grade Series 3, Model 1905, 17 Jewels
16S-M1905-17J-ONP: 28,700 46.56%
16s, Grade Series 3, Model 1905, 17 Jewels, Openface/Pendant/Nickel 		Other: 32,940
Other Configs or Unclassified
16S-M1905-17J-ONP-A3PTI: 28,700 46.56%

Population Registry for This Run

Image Serial Number Run Position Primary Identification Method Discovery Date
1 927004 #4 Observation July 22, 2015
2 927009 #9 Observation July 22, 2015
3 927052 #52 Observation July 22, 2015
4 927103 #103 Observation July 22, 2015
5 927189 #189 Observation July 22, 2015
6 927236 #236 Observation July 22, 2015
7 927258 #258 Observation July 22, 2015
8 927264 #264 Observation July 22, 2015
9 927345 #345 Observation July 22, 2015
10 927361 #361 Observation July 22, 2015
11 927371 #371 Observation July 22, 2015
12
Image Credit: Dan4606 		927434 #434 Collection August 30, 2022
13 927456 #456 Observation July 22, 2015
14 927465 #465 Observation July 22, 2015
15 927470 #470 Observation July 22, 2015
16 927591 #591 Observation July 22, 2015
17 927654 #654 Observation July 22, 2015
18 927712 #712 Observation July 22, 2015
19 927721 #721 Observation July 22, 2015
20 927731 #731 Observation July 22, 2015
21 927756 #756 Observation July 22, 2015
22 927780 #780 Collection July 11, 2022
23 927824 #824 Observation July 22, 2015
24 927826 #826 Observation July 22, 2015
25 928034 #1034 Observation July 22, 2015
26
Image Credit: netmind 		928065 #1065 Collection May 25, 2023
27 928069 #1069 Observation July 22, 2015
28 928211 #1211 Observation July 22, 2015
29 928268 #1268 Collection September 22, 2021
30 928292 #1292 Observation July 22, 2015
31
Image Credit: esoxhunter 		928360 #1360 Collection March 12, 2018
32 928451 #1451 Observation July 22, 2015
33 928460 #1460 Collection December 04, 2020
34 928462 #1462 Observation July 22, 2015
35 928488 #1488 Observation July 22, 2015
36 928526 #1526 Observation July 22, 2015
37 928590 #1590 Collection October 29, 2020
38 928624 #1624 Observation July 22, 2015
39 928711 #1711 Collection February 21, 2019
40 928728 #1728 Observation July 22, 2015
41 928796 #1796 Observation July 22, 2015
42 928824 #1824 Observation July 22, 2015
43 928868 #1868 Observation July 22, 2015
44 928899 #1899 Observation July 22, 2015
45 928904 #1904 Observation July 22, 2015
46 928968 #1968 Observation July 22, 2015
47 929011 #2011 Observation July 22, 2015
48 929050 #2050 Observation July 22, 2015
49 929076 #2076 Observation July 22, 2015
50 929123 #2123 Observation July 22, 2015
51 929128 #2128 Collection January 23, 2017
52 929134 #2134 Observation July 22, 2015
53
Image Credit: JohnDWalter 		929136 #2136 Collection September 14, 2017
54 929202 #2202 Observation July 22, 2015
55 929243 #2243 Observation July 22, 2015
56 929260 #2260 Observation July 22, 2015
57 929323 #2323 Observation July 22, 2015
58 929339 #2339 Observation July 22, 2015
59 929364 #2364 Observation July 22, 2015
60 929383 #2383 Observation July 22, 2015
61 929386 #2386 Observation July 22, 2015
62 929430 #2430 Observation July 22, 2015
63 929436 #2436 Observation July 22, 2015
64 929486 #2486 Observation July 22, 2015
65 929490 #2490 Observation July 22, 2015
66 929546 #2546 Collection March 12, 2021
67 929575 #2575 Observation July 22, 2015
68 929594 #2594 Observation July 22, 2015
69 929619 #2619 Observation July 22, 2015
70 929700 #2700 Observation July 22, 2015
71 929729 #2729 Observation July 22, 2015
72 929884 #2884 Observation July 22, 2015
73 929888 #2888 Observation July 22, 2015
74 929957 #2957 Collection October 13, 2022
75 929993 #2993 Observation July 22, 2015
Standard Deviation of Known Examples: 881.98 (Expected: 866.17, Δ15.81/0.53%)

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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 · March 28, 2023

Serial Number 929498 was reported as accurate.

Anonymous · March 11, 2023

Serial Number 927722 was reported as accurate.

mrgoodwatch Supporter 16 · July 4, 2021

Serial Number 928575 was reported as accurate.

Anonymous · May 4, 2021

Serial Number 929612 was reported as accurate.

Anonymous · December 6, 2020

Serial Number 929395 was reported as accurate.

Anonymous · November 17, 2020

Serial Number 929495 was reported as accurate.

MoatsJustin1 2538 · October 22, 2020

Serial Number 927721 was reported as accurate.

Anonymous · August 9, 2020

Serial Number 927285 was reported as accurate.

r72gsaol 37 · April 17, 2020

Serial Number 928219 was reported as accurate.

Anonymous · November 27, 2019

Serial Number 928250 was reported as accurate.

Anonymous · September 19, 2019

Serial Number 929477 was reported as accurate.

Anonymous · September 7, 2019

Serial Number 929209 was reported as accurate.

von1943 361 · August 14, 2019

Serial Number 927939 was reported as accurate.

Anonymous · February 23, 2019

Serial Number 929780 was reported as accurate.

Anonymous · January 27, 2019

Serial Number 927030 was reported as accurate.

Anonymous · December 17, 2018

Serial Number 929509 was reported as accurate.

Anonymous · November 26, 2018

Serial Number 928711 was reported as accurate.

Anonymous · November 7, 2018

Serial Number 928671 was reported as accurate.

E. Howard Watch Co. (Keystone) Grade Series 3 Pocket Watch
E. Howard Watch Co. (Keystone) Grade Series 3 Pocket Watch