Look like standard London proof house markings.
Next to the Nitro Proof is the calibre then the case length then the charge weight in grains being nitro cellulose and what looks like a projectile weight.
Regards
AlanD
Sydney
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- Sat Feb 22, 2020 11:45 pm
- Forum: Q & A about the 8/81
- Topic: British proof marks on Model 8?
- Replies: 12
- Views: 8154