Later? Pattern (rear rim join) US M1 Steel helmet, possibly Vietnam era?
Marks and Stamps:| Accession Number: 500 | Period of Use: |
| Type: Helmet | War Zones: |
| Country of Origin: U.S.A. | Type Date: Post WW2? |
| Manufacturer: Unknown | Serial Number: |
| Manufacture Date: unknown | Calibre/Ammunition: |
| Weight: | Length Overall: |
| Cyclic Rate: | Length Barrel: |
| Deactivation Certificate Number: |