Jerry, I went back and read your original post and saw you were asking about a gun that was made 70 years ago. That would be in 1940 and I would not buy a Brit gun from that time period,at all.
As you have read the golden era was between the wars and for my money the best for value years were at the turn of the century{19th to 20th}. Find a nice one from before 1898 and you don't have to deal with the Feds to take delivery.
Advice to have a competent smith go over the gun is to be taken to heart and should be a condition of the sale. Good luck