Pocket Watch Database
Bay State Watch Case Co.
Case Grades
Note: This chart is not intended to be a comprehensive list of grades. Some grades changed traits over time and other grades may not be listed. This chart will be improved as additional information is studied.
| Image | Name | Case Material | Gold Content | Gurantee | Source Catalogs | Trademarked |
|---|---|---|---|---|---|---|
 |
14K | Gold | 14K | 1887LAM, 1890SFM, 1890AP | ||
 |
20YR GF | Gold-Filled | 20-Year | |||
 |
Acme Lock | Coin Silver | ||||
 |
Argentine Silver | Nickel Alloy | 1887LAM | |||
 |
Bay State Coin | Coin Silver | 1887LAM, 1890AP | |||
 |
Imperial | Silver-Filled | 1887LAM, 1890SFM, 1890AP | May 22, 1894 | ||
| Legal Seal | Gold-Filled | 14K | 21-Year | 1890AP |
