Pocket Watch Database
Back to Case Grades
Keystone Watch Case Co.
Keystone Watch Case Co.
Boss Scale 10K/20YR
Keystone Watch Case Co. Boss Scale 10K/20YR
![Watch Case Marking for Keystone Watch Case Co. Boss Scale 10K/20YR: Keystone
Watch Case Co.
[Keystone Block]
[Scales]
Guaranteed
J.Boss
20 Years](https://pocketwatchdatabase.com/assets/images/cases/Keystone-Boss-20Years.jpg)
Note: Case manufacturers modified markings over time. As a result, the image above is simply a representation of one particular marking used by the company. Your case marking may differ based on the production era and other parameters.
Boss Scale 10K/20YR
Find Boss Scale 10K/20YR Cases For Sale on eBay See What Other Boss Scale 10K/20YR Cases Have Sold For on eBay![Watch Case Marking Variant for Keystone Watch Case Co. Boss Scale 10K/20YR: Case
Guaranteed
J.Boss
20 Years
[Keystone Block]](https://pocketwatchdatabase.com/assets/images/cases/Boss-20Years.jpg)
![Watch Case Marking Variant for Keystone Watch Case Co. Boss Scale 10K/20YR: Keystone
Watch Case Co.
[Keystone Block]
[Scales]
U.S.A.](https://pocketwatchdatabase.com/assets/images/cases/Keystone-Scales-USA.jpg)
![Watch Case Marking Variant for Keystone Watch Case Co. Boss Scale 10K/20YR: Keystone
Watch Case Co.
[Keystone Block]
[Scales]
J.Boss
10K
Gold Filled](https://pocketwatchdatabase.com/assets/images/cases/Keystone-Boss-10K.jpg)
![Watch Case Marking Variant for Keystone Watch Case Co. Boss Scale 10K/20YR: Keystone
Watch Case Co.
[Keystone Block]
[Scales]](https://pocketwatchdatabase.com/assets/images/cases/Keystone-Scales-2.jpg)
![Watch Case Marking Variant for Keystone Watch Case Co. Boss Scale 10K/20YR: Keystone
Watch Case Co.
[Keystone Block]
[Scales]
J.Boss
20 Years](https://pocketwatchdatabase.com/assets/images/cases/Keystone-Boss-20Years-2.jpg)
![Watch Case Marking Variant for Keystone Watch Case Co. Boss Scale 10K/20YR: Keystone
Watch Case Co.
[Keystone Block]
[Scales]
Guaranteed
J.Boss
20 Years](https://pocketwatchdatabase.com/assets/images/cases/Keystone-Boss-10K-20Years.jpg)
![Watch Case Marking Variant for Keystone Watch Case Co. Boss Scale 10K/20YR: Guaranteed
J.Boss
20 Years
[Keystone Block]](https://pocketwatchdatabase.com/assets/images/cases/Keystone-Boss-20Years-3.jpg)
![Watch Case Marking Variant for Keystone Watch Case Co. Boss Scale 10K/20YR: Keystone
Watch Case Co.
[Keystone Block]
[Scales]](https://pocketwatchdatabase.com/assets/images/cases/Keystone-Scales-10K-3.jpg)
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission.
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Note: All images are protected by copyright belonging to the uploader. Use without permission is prohibited.
Information provided by users may contain inaccuracies. Dials, cases, and hands displayed may not be original to the watch.
0 Admirations
| Serial No.: | #648759 |
| Manufacturer: | Rockford |
| Grade: | 160 |
| Size: | 0s |
| Model: | 1 |
| Jewels: | 15j |
| Setting: | Pendant |
| Finish: | Nickel |
| Est. Date: | 1904 |
| Case Material: | Goldfilled |
| Gold Karat: | 10 |
| Guarantee: | 20 |
| Case Serial: | 7994550 |
| Added By: |  Hbhostetler |
4 Admirations
| Serial No.: | #16570515 |
| Manufacturer: | Elgin |
| Grade: | 298 |
| Size: | 0s |
| Model: | 2 |
| Jewels: | 7j |
| Setting: | Pendant |
| Finish: | Gilt |
| Est. Date: | 1912 |
| Case Material: | Goldfilled |
| Gold Karat: | 10 |
| Guarantee: | 20 |
| Case Serial: | 8220759 |
| Added By: | JeffWinBrisbane |
7 Admirations
| Serial No.: | #22554694 |
| Manufacturer: | Elgin |
| Grade: | 453 |
| Size: | 16s |
| Model: | 15 |
| Jewels: | 23j |
| Setting: | Lever |
| Finish: | Nickel |
| Est. Date: | 1920 |
| Case Model: | J.Boss |
| Case Material: | Goldfilled |
| Gold Karat: | 10 |
| Guarantee: | 20 |
| Case Serial: | 9338317 |
| Added By: |  ultimatekaiser |
4 Admirations
| Serial No.: | #22556819 |
| Manufacturer: | Elgin |
| Grade: | 455 |
| Size: | 16s |
| Model: | 15 |
| Jewels: | 19j |
| Setting: | Lever |
| Finish: | Nickel |
| Est. Date: | 1920 |
| Case Model: | J Boss |
| Case Material: | Goldfilled |
| Gold Karat: | 10 |
| Guarantee: | 20 |
| Case Serial: | 9391841 |
| Added By: |  Rickglick1 |
4 Admirations
| Serial No.: | #24627288 |
| Manufacturer: | Elgin |
| Grade: | 454 |
| Size: | 16s |
| Model: | 15 |
| Jewels: | 21j |
| Setting: | Lever |
| Finish: | Nickel |
| Est. Date: | 1922 |
| Case Model: | J Boss |
| Case Material: | Goldfilled |
| Gold Karat: | 10 |
| Guarantee: | 20 |
| Case Serial: | 9428207 |
| Added By: | Rickglick1 |
7 Admirations
| Serial No.: | #26615679 |
| Manufacturer: | Waltham |
| Grade: | Vanguard |
| Size: | 16s |
| Model: | 1908 |
| Jewels: | 23j |
| Setting: | Pendant |
| Finish: | Nickel |
| Est. Date: | 1928 |
| Case Material: | Goldfilled |
| Gold Karat: | 10 |
| Guarantee: | 20 |
| Case Serial: | 9619314 |
| Added By: |  SeikoDiverSRP043 |
6 Admirations
| Serial No.: | #5334515 |
| Manufacturer: | Illinois |
| Grade: | 163 Bunn Special |
| Size: | 16s |
| Model: | 14 |
| Jewels: | 23j |
| Setting: | Lever |
| Finish: | Nickel |
| Est. Date: | 1930 |
| Case Model: | Bunn Special |
| Case Material: | Goldfilled |
| Gold Karat: | 10 |
| Guarantee: | 20 |
| Case Serial: | 9820075 |
| Added By: |  cliffdobbins |
12 Admirations
| Serial No.: | #1B8622 |
| Manufacturer: | Ball - Hamilton |
| Grade: | 999b |
| Size: | 16s |
| Model: | 5 |
| Jewels: | 21j |
| Setting: | Lever |
| Finish: | Nickel |
| Est. Date: | 1948 |
| Case Model: | J Boss RR standard |
| Case Material: | Goldfilled |
| Gold Karat: | 10 |
| Guarantee: | 20 |
| Case Serial: | 9898723 |
| Added By: | ultimatekaiser |