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Per Jon Speed’s book, the Mauser Banner trademark first appeared on the receiver ring around 1924. The size and position of the Mauser Banner changed over the course of production. On the left side of the receiver, you should have one of the following proof marks. Commercial ‘BU’ proof marks 1898 – 1924 Commercial ‘BUG’ proof marks 1924 – 1934 Approx. SN range 87XXX – 111XXX Commercial ‘BUGN’ proof marks 1934 – 19XX Approx. SN range 111XXX – 126XXX Hope this helps. |