US M1 Steel Helmet. Rim seam is at front which suggests a WW2 date, but pivoting chinstrap fixings are possibly late war.
Marks and Stamps:| Accession Number: 499 | Period of Use: |
| Type: Helmet | War Zones: |
| Country of Origin: U.S.A. | Type Date: WW2? |
| Manufacturer: Unknown | Serial Number: |
| Manufacture Date: Unknown | Calibre/Ammunition: |
| Weight: | Length Overall: |
| Cyclic Rate: | Length Barrel: |
| Deactivation Certificate Number: |