Greetings Again,
C&B would be Collings and Brady and 1 in 11 inch twist. I've seen stamping like that on a barrel Din fitted in the 90's. Your description of the alterations to the bolt face sounded just like mine. I also remembered there was a name on mine. John Wilkes 7046. It meant nothing to me and google did not turn anything up. The action has been converted to single shot with a fat plate soldered on. Would like to know more. I will try some pics tomorrow.
Regards Grandpamac.
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