About a year ago I bought a hammerless Parker 12g with twist barrels from a trusted dealer but only based off pictures. They were not sure what the grade was and thought it was a Trojan which it is not I believe.
• The serial number puts it at 1890
• There are serial number stamps on the trigger guard, side of the barrel lug, and on the water table.
• The letter for the grade stamped on the water table looks like an "r" lowercase, or possibly a "P" uppercase.
• The roll pin is not slotted on either side.
• It is a size 1 12g.
• It has extractors not ejectors.
The link leads to all the photos I recently took of her.
Additionally I read through as much as I could regarding shooting non black powder loads with this gun and it would seem that while many do so with twist barrels (using RST or similar) there seem like a few who advise against it. I know it's a personal choice but I'd be interested in any recommendations, specifically if someone knows where I could get black powder paper cartridges.