This serial number data is from the Serial Number Reference Book for Metalworking Machinery (1959 edition).
| Serial No. | Type | Machine Description | Date |
| 2 | Gear Hobber & Thread Miller | #5,6,5M & 6M Gear Hobber & Thread Miller | Dec 1927 |
| 5 | Gear Hobber & Thread Miller | #5,6,5M & 6M Gear Hobber & Thread Miller | Dec 1928 |
| 13 | Gear Hobber & Thread Miller | #5,6,5M & 6M Gear Hobber & Thread Miller | Dec 1929 |
| 17 | Gear Hobber & Thread Miller | #5,6,5M & 6M Gear Hobber & Thread Miller | Dec 1930 |
| 18 | Gear Hobber & Thread Miller | #5,6,5M & 6M Gear Hobber & Thread Miller | Dec 1934 |
| 20 | Gear Hobber & Thread Miller | #5,6,5M & 6M Gear Hobber & Thread Miller | Dec 1935 |
| 21 | Gear Hobber & Thread Miller | #5,6,5M & 6M Gear Hobber & Thread Miller | Dec 1938 |
| 22 | Gear Hobber & Thread Miller | #5,6,5M & 6M Gear Hobber & Thread Miller | Dec 1939 |
| 26 | Gear Hobber & Thread Miller | #5,6,5M & 6M Gear Hobber & Thread Miller | Dec 1940 |
| 37 | Gear Hobber & Thread Miller | #5,6,5M & 6M Gear Hobber & Thread Miller | Dec 1941 |
| 62 | Gear Hobber & Thread Miller | #5,6,5M & 6M Gear Hobber & Thread Miller | Dec 1942 |
| 82 | Gear Hobber & Thread Miller | #5,6,5M & 6M Gear Hobber & Thread Miller | Dec 1943 |
| 85 | Gear Hobber & Thread Miller | #5,6,5M & 6M Gear Hobber & Thread Miller | Dec 1944 |
| 89 | Gear Hobber & Thread Miller | #5,6,5M & 6M Gear Hobber & Thread Miller | Dec 1945 |
| 90 | Gear Hobber & Thread Miller | #5,6,5M & 6M Gear Hobber & Thread Miller | Dec 1946 |
| 91 | Gear Hobber & Thread Miller | #5,6,5M & 6M Gear Hobber & Thread Miller | Dec 1947 |
| 93 | Gear Hobber & Thread Miller | #5,6,5M & 6M Gear Hobber & Thread Miller | Dec 1948 |
| 94 | Gear Hobber & Thread Miller | #5,6,5M & 6M Gear Hobber & Thread Miller | Dec 1949 |
| 98 | Gear Hobber & Thread Miller | #5,6,5M & 6M Gear Hobber & Thread Miller | Dec 1952 |