As Craig noted two of the bbls have 2nd serial nos on them. Also this is a single hook gun (appears to be large hook) which puts it out of sequence with that 19,537 SN. an 1892 era gun would normally have been a two hook gun. It has plate mounted sears as well as it had the cross pin in the bar, which would have had the center cut out to accommodate the hook. This gun could have been built out of sequence on an existing action or it could have been returned to the factory for the extra bbls & an action Upgrade. The action itself in my opinion is an early 1890's one which is compatible with both the G grade & the pushbutton forend. It can't be seen from the pictures if the forend originally had an extractor cam or not, but if you note the configuration of the bbl is a bit different on the one with the single SN just ahead of the lug. It would be interesting to see a view of the entire lug on this bbl.
