Overall pics of the rifle will be a plus. Do all numbers match?
Does the stock match?
Original production did not number the floor plate nor bands... perhaps post war re purposing, re-bluing?
Watched the video...
Cool... the orig worn rust blue.... is "converted" & "refurbed" by steaming and then carded with a wire wheel.... The process was impressive for sure! ,,,, sounds like a re-blue to me.
Was a dou 41 originally even rust blued?
Negative, the process simply lifts the active rust to the surface for removal via soft carding. Doesn’t touch or add to original finish.