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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)
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2 Admirations
| Serial No.: | #16028746 |
| Manufacturer: | Waltham |
| Grade: | Vanguard |
| Size: | 16s |
| Model: | 1899 |
| Jewels: | 23j |
| Setting: | Lever |
| Finish: | Nickel |
| Est. Date: | 1907 |
| Case Model: | J Boss |
| Case Material: | Goldfilled |
| Gold Karat: | 10 |
| Guarantee: | 20 |
| Case Serial: | 41057 |
| Added By: |  Rickglick1 |
4 Admirations
| Serial No.: | #2576778 |
| Manufacturer: | Hamilton |
| Grade: | 992 |
| Size: | 16s |
| Model: | 2 |
| Jewels: | 21j |
| Setting: | Lever |
| Finish: | Nickel |
| Est. Date: | 1930 |
| Case Material: | Goldfilled |
| Gold Karat: | 10 |
| Guarantee: | 20 |
| Case Serial: | 53922 |
| Added By: |  rjandladyj |
5 Admirations
| Serial No.: | #5497080 |
| Manufacturer: | Illinois |
| Grade: | 161a |
| Size: | 16s |
| Model: | 15 |
| Jewels: | 21j |
| Setting: | Lever |
| Finish: | Nickel |
| Est. Date: | 1932 |
| Case Model: | J Boss Bunn Special #107 |
| Case Material: | Goldfilled |
| Gold Karat: | 10 |
| Guarantee: | 20 |
| Case Serial: | 85551 |
| Added By: | Rickglick1 |
7 Admirations
| Serial No.: | #34574527 |
| Manufacturer: | Elgin |
| Grade: | 506 |
| Size: | 16s |
| Model: | 15 |
| Jewels: | 21j |
| Setting: | Lever |
| Finish: | Nickel |
| Est. Date: | 1934 |
| Case Material: | Goldfilled |
| Gold Karat: | 10 |
| Guarantee: | 20 |
| Case Serial: | 89607 |
| Added By: |  ultimatekaiser |
5 Admirations
| Serial No.: | #605468 |
| Manufacturer: | Illinois |
| Grade: | 2 |
| Size: | 18s |
| Model: | 2 |
| Jewels: | 11j |
| Setting: | Lever |
| Finish: | Gilt |
| Est. Date: | 1886 |
| Case Model: | 18s |
| Case Material: | Goldfilled |
| Gold Karat: | 10 |
| Guarantee: | 20 |
| Case Serial: | 1477546 |
| Added By: |  machinistrich |
2 Admirations
| Serial No.: | #779057 |
| Manufacturer: | Hamilton |
| Grade: | 974 |
| Size: | 16s |
| Model: | 1 |
| Jewels: | 17j |
| Setting: | Lever |
| Finish: | Nickel |
| Est. Date: | 1910 |
| Case Model: | Victory |
| Case Material: | Goldfilled |
| Gold Karat: | 10 |
| Guarantee: | 20 |
| Case Serial: | 4414528 |
| Added By: | Rickglick1 |
7 Admirations
| Serial No.: | #B252950 |
| Manufacturer: | Ball - Waltham |
| Grade: | Official Standard |
| Size: | 16s |
| Model: | 1899 |
| Jewels: | 21j |
| Setting: | Lever |
| Finish: | Nickel |
| Est. Date: | 1911 |
| Case Model: | Victory |
| Case Material: | Goldfilled |
| Gold Karat: | 10 |
| Guarantee: | 20 |
| Case Serial: | 4467302 |
| Added By: | Rickglick1 |
5 Admirations
| Serial No.: | #3354391 |
| Manufacturer: | Illinois |
| Grade: | 706 |
| Size: | 16s |
| Model: | 9 |
| Jewels: | 17j |
| Setting: | Lever |
| Finish: | Nickel |
| Est. Date: | 1918 |
| Case Model: | Model 9 |
| Case Material: | Goldfilled |
| Gold Karat: | 10 |
| Guarantee: | 20 |
| Case Serial: | 4720887 |
| Added By: |  giddykippa |
