Mike,
its really a bit hard to say. Thats not the original chambering for the rifle is it? I have never seen one in that caliber, but anything is possible. I seem to remember that gun being about 1904 or so. My cartridge book is at the shop, but I think .450#2 was a later cartridge. That will detract from the value, but my guess is that is about a 7-8K dollar gun on todays market. They are a great action, and free of several of the problems that The Gibbs pattern exhibit. Tang safety? I couldnt see in the pics.
Steve
