This serial number data is from the Serial Number Reference Book for Metalworking Machinery (1959 edition).
| Serial No. | Type | Machine Description | Date |
| 231 | Rotary Surface Grinders | Model A, 8” Grinder | Dec 1919 |
| 408 | Rotary Surface Grinders | Model A, 8” Grinder | Dec 1927 |
| 503 | Rotary Surface Grinders | Model A, 8” Grinder | Dec 1929 |
| R-2-46 | Rotary Surface Grinders | Model A, 8” Grinder | Dec 1935 |
| 12155 | Rotary Surface Grinders | Model A, 12” Grinder | Dec 1919 |
| 12218 | Rotary Surface Grinders | Model A, 12” Grinder | Dec 1927 |
| 12243 | Rotary Surface Grinders | Model A, 12” Grinder | Dec 1929 |
| R-2-12251 | Rotary Surface Grinders | Model A, 12” Grinder | Dec 1935 |
| 1625 | Rotary Surface Grinders | Model A, 16” Grinder | Dec 1919 |
| 1684 | Rotary Surface Grinders | Model A, 16” Grinder | Dec 1927 |
| 16100 | Rotary Surface Grinders | Model A, 16” Grinder | Dec 1929 |
| R-2-16111 | Rotary Surface Grinders | Model A, 16” Grinder | Dec 1935 |
| 3010 | Rotary Surface Grinders | All Lines | Dec 1947 |