Hi, Tom, thanks for the reply. I really think it was an after market by Schultz and Larsen as the barrel has only their maker mark on the top, the 45..70 on the underside next to the end of the barrel, no other markings, ie: proof, government or anything else. It is really a lovely gun and can't wait to shoot it. My personal feel is that it is an early rebarrel job, and maybe, as Ned said, converted for Greenland for the heavier round. The more I look at it, the better I like it..cheers..Eric