| Type | HEI |
|---|
| Projectile | steel, aluminum fuze, maroon, dark green tip, 1 iron driving band Projectile Markings: (yellow ink) H-17-70 HEI TRI 820 A (stamped on fuze) A12-22-70 (stamped on projectile) 156 10-14 |
|---|
| Case | steel, choke crimp, grey lacquered, 1 hole |
|---|
| Primer | percussion, flat, copper, screw-in crimp, red annulus |
|---|
| Headstamp | 20MM 820 A AA 32 70 MR (on primer assembly) DN 0? 69 |
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| Notes | This is a contract round made by Manurhin (France) for South Africa. Primer is struck and powder has been removed through a hole in the case. Projectile and fuze are empty. |
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