This serial number data is from the Serial Number Reference Book for Metalworking Machinery (1959 edition).
| Serial No. | Type | Machine Description | Date |
| 39-13 | Milling Machines | All Milling Machines | Dec 1938 |
| 40-37 | Milling Machines | All Milling Machines | Dec 1939 |
| 40-280H | Milling Machines | All Milling Machines | Dec 1940 |
| 40-823H | Milling Machines | All Milling Machines | Dec 1941 |
| 40-1488H | Milling Machines | All Milling Machines | Dec 1942 |
| 40-1958H | Milling Machines | All Milling Machines | Dec 1943 |
| 40-2201H | Milling Machines | All Milling Machines | Dec 1944 |
| 40-2476H | Milling Machines | All Milling Machines | Dec 1945 |
| 40-2848H | Milling Machines | All Milling Machines | Dec 1946 |
| 40-3128H | Milling Machines | All Milling Machines | Dec 1947 |
| 50-3357 | Milling Machines | All Milling Machines | Dec 1948 |
| 50-3506 | Milling Machines | All Milling Machines | Dec 1949 |
| 40-3722 | Milling Machines | All Milling Machines | Dec 1950 |
| 55-4164 | Milling Machines | All Milling Machines | Dec 1951 |
| 55-4615 | Milling Machines | All Milling Machines | Dec 1952 |
| 55-5101 | Milling Machines | All Milling Machines | Dec 1953 |
| 40-5808 | Milling Machines | All Milling Machines | Dec 1954 |
| 55-6551 | Milling Machines | All Milling Machines | Dec 1955 |
| 55-7270 | Milling Machines | All Milling Machines | Dec 1956 |
| 45-7936 | Milling Machines | All Milling Machines | Dec 1957 |
Information Sources
- Serial Number Reference Book for Metalworking Machinery, by the Industrial Publishing Corp., 1959