You may be interested in some of this.

This is a circa 1898 price list from the Belgian maker Ferdinand Drissen.


In 1888 the British conducted destructive testing on various barrel materials.
http://www.doublegunshop.com/forums/ubbt...df792#Post55796

Your friend may want to hold on to that old lifter for a bit:
http://www.doublegunshop.com/forums/ubbt...8e33647660df792

In any case, if anyone intends to shoot this gun, you are getting excellent advice. Have it checked 1st.

Pete