Erick,
That is an interesting Daly, but I don't know who made it. I have some thoughts, but I do not know defnitively.
As you mention the "R.S." initials just ahead of the barrel flats are common on Lindner-made Dalys. These are thought to be the barrel man's initials. There are dozens of Dalys noted with the mark in the database.
The vintage of this hammergun is in line with the last one - circa - 1875. The serial number of gun (#1092) is interesting for two reasons. First is that this particular sequence falls immediately in front of the Lindner-marked Dalys (unlike the first Daly you provided pictures for.) The presence (and shape)of the dollshead extension, carvin of the fences, and position of the pins in the action are also (mostly) in line with early-made Lindner-marked guns. I think that provides a clue to the maker. (My guess, Heinrich's father, Georg.)
The seond interesting item is that the serial number is a duplicate for a Lindner-marked hammerless Jakob gun made thrity years later. The boxlock was on the Cabelas website last year. The Daly serial number sequence does "start over" during the 1892 timeframe. This is one of many things that makes serial nunbering sequence on Dalys so confusing. We know a lot more than we used to but there is no magic Rosetta Stone yet.
Ken
