Encyclopedia · Manufacture, materials, and testing

Ordnance inspection marks

Ordnance inspection marks were the stamps and initials that inspectors placed on accepted guns, projectiles, and equipment to certify that they had passed proof and inspection.

Also known as: inspector's marks.

TypeAcceptance and inspection stamps
Placed byOrdnance inspectors
PurposeCertify that an item passed proof and inspection
Common formInspector's initials and acceptance marks

Marks of acceptance

Before ordnance entered service it was proved and inspected, and the inspector marked accepted items with stamps, most often his initials, together with acceptance marks. These marks certified that a gun, projectile, or piece of equipment had met the required standard.

Surviving inspection marks help identify who accepted an item and when, and they are part of the evidence, along with foundry and maker's marks, used to attribute and date ordnance.

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