Pocket Watch Database
Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/935231
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/935231
Access Date: May 22, 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:
-Series2-16s-Model1905.jpg)
E. Howard Watch Co. (Keystone)
Grade: Series 2
| Manufacturer: | E. Howard Watch Co. (Keystone) |  |
| Manufacturer Location: | Waltham, Massachusetts | |
| Movement Serial Number: | 935231 | |
| Grade: | Series 2 | |
| Model: | 1905 | |
| Estimated Production Year: | 1909 | |
| Run Quantity: | 570 | |
| Grade/Model Run: | 10 of 11 | |
| Grade/Model Total Production: | 4,090 | |
| Variant Est. Production: | 1,470 (16S-M1905-17J-ONM) | |
| Size: | 16s | |
| Jewels: | 17j | |
| Jewel Material: | Ruby & Sapphire | |
| Jewel Setting: | Raised Gold Settings (Screw-Set) | |
| Movement Configuration: | Openface | |
| Movement Finish: | Nickel | |
| Finish Pattern: | Parallel Bar (mixed) | |
| Movement Setting: | Mixed | |
| 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: | No | |
| Dial Feet Locations: | 10.7, 24.3, 48.9 | |
| U.S. Patents: | 781263, 796162, 886387, 900183, 992013, 971496, 978612, 981667 | |
| Case: | Various | |
| Run ID: | 58.G10.16S40.161905M40.O34.M4.17J43 | |
| Database Version: | v52.296 | |
| Advanced Metrics | ||
| PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration | 5.84 | |
| PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration | 19.32 | |
| Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration | 0.375% | |
| Registry Population: | 16 (2.81%) | |
|
Research Note: #935455 and #935764: Reported as Lever-Set, #935584: Reported with Checkerboard pattern and marked "Adjusted 3 Positions," #935760: Reported as Marked "Adjusted 5 Positions." #935355: Verified as Marked "No. 9" and "Adjusted 3 Pos." (Pendant) with Wide Parallel Damaskeening [NAWCC]
|
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Production Metrics Tree: Grade Series 2
Target Profile: 16S-M1905-17J-ONM-A5PTI
| E. Howard Watch Co. (Keystone) Grade Series 2 (All Variations): 10,590 ETP | |||||
| 16S: 10,590 100.00% 16s, Grade Series 2 |
|||||
| 16S-M1905: 4,090 38.62% 16s, Grade Series 2, Model 1905 |
Other: 6,500
Other Models or Unclassified |
||||
| 16S-M1905-17J: 3,940 37.20% 16s, Grade Series 2, Model 1905, 17 Jewels |
Other: 150
Other Jewels or Unclassified |
||||
| 16S-M1905-17J-ONM: 1,470 13.88% 16s, Grade Series 2, Model 1905, 17 Jewels, Openface/Mixed/Nickel |
Other: 2,470
Other Configs or Unclassified |
||||
| 16S-M1905-17J-ONM-A5PTI: 1,470 13.88% | |||||
Population Registry for This Run
| Image | Serial Number | Run Position | Primary Identification Method | Discovery Date | |
|---|---|---|---|---|---|
|
There are 16 watches in the population registry for this run with 1 image.
|
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Help Us Help Others By Improving the Database:
Does this information describe your movement accurately?
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 23, 2024
Serial Number 935311 was reported as accurate.
Anonymous · November 27, 2023
Serial Number 935695 was reported as inaccurate.
Note: wide slant parallel damskeening
marked "17 jewels"
marked "adjusted 5 pos"
lever set
sapphire pallets
steel escape wheel
double roller
railroad grade
marked "17 jewels"
marked "adjusted 5 pos"
lever set
sapphire pallets
steel escape wheel
double roller
railroad grade
Curator Response: Thanks for the report. If possible, please upload an image of the movement to your collection for further evaluation and documentation.
Anonymous · August 30, 2020
Serial Number 935695 was reported as inaccurate.
Note: Almost a yes. However this movement, while 17j
and open faced with lever set, has wide parallel
finish and marked "adjusted 5 pos."
and open faced with lever set, has wide parallel
finish and marked "adjusted 5 pos."
Curator Response: Thanks for the report. If possible, please upload an image of the movement to your collection for further evaluation and documentation.
Anonymous · July 1, 2020
Serial Number 935503 was reported as inaccurate.
Note: series 4 with checkerboard damaskeen
Curator Response: Thanks for the report. If possible, please upload an image of the movement to your collection for further evaluation and documentation.
Changes since this report was submitted:
Plate changed from Bridge to 3/4
Anonymous · May 9, 2019
Serial Number 935355 was reported as inaccurate.
Note: While this movement has the damaskeening of a
3/4 plate series 2. it is marked No.9 and Adj. 3
Pos. Is there any reason for this ?
3/4 plate series 2. it is marked No.9 and Adj. 3
Pos. Is there any reason for this ?
Curator Response: Thanks for the report. The information on this serial number was previously recorded in the research notes for the run. There have been various markings found on the Keysone Howard movements that do not match the expected grade classification. This particular movement was produced prior to the introduction of the "official" Series 9. It is possible the company was begining to experiement with offering a 3-Position 3/4 plate movement at the time and finished a Series 2 with 3 Positional Adjustements instead of 5 and marked it accordingly.
Changes since this report was submitted:
Plate changed from Bridge to 3/4
johnbjackson Supporter 20 · February 10, 2019
Serial Number 935758 was reported as accurate.
Changes since this report was submitted:
Plate changed from Bridge to 3/4
Anonymous · February 10, 2019
Serial Number 935758 was reported as accurate.
Changes since this report was submitted:
Plate changed from Bridge to 3/4
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