That gun is very similar to a RA Dickson that I owned for many years. Mine was made and delivered in 1893 and had the same cocking indicators, which disappeared when Dickson modified the design to accommodate overhanging intercepting sears. Mine was originally 29" Damascus barrels, but was rebarreled (by the maker) with 27" chopper lump steel barrels. It was a delight to shoot.
I believe that these Dicksons must have used some type of high nickel-steel alloy for the actions, as most of the ones I see appear to be 'polished' with little or no case colors evident.
