the model 1905 is the rarest of this old models, don#t know why it dont have any proof marks at all

try to get the oil out of the wood with a good blow dryer and some acetone. be careful with the heat, just under the temperature it can made damage. allways get some heat on the black spot, wipe away with acetone and do it again. it needs some time!
I can see no problem for a gunmaker/toolmaker to change scope mount parts for this very special base, looks british to me.