WOW this is really interesting. I didn't know so much information was in those stamps until I started this thread. So to sum up, my gun was made sometime between 1904 and 1925 and then reproofed in 1982. It is in remarkable shape for a gun that is that old (although it could have been refinished sometime in its life.
Thanks for all your help.
Next question is what is its value. I think I paid around $400 for it plus shipping and import costs -- probably $600 total cost.
Alan