Saw a BBF today marked OSZM that I am considering making an offer on. 16 over what looks like 7.7 x 57. Looks to have passed proof at ZM in Feb. of 1915. Has the original optics marked Sirius 4x32. Any help Iding maker/seller and best guess on rifle caliber. I am thinking 8x57r. but 7.7 seems a little tight. Any any info on scope would also be very appreciated.
Mike
Mike
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