John, my files contain the earliest reference to the Forehand hammerless double in 1892. That illustration shows a single pin. I have no illustrations of a multiple pin hammerless double. Sullivan Forehand died in June of 1898, after which his company went on to Hopkins and Allen as I recall.

I'd guess your multiple pin gun is prior to 1892, as all illustrations I see after 1892 to 1898 show a single pin.


https://docs.google.com/document/d/1PqK3UImDCrsOrk6O_2DsovHXvaNSzliSiwaP35Y6PMk/edit?tab=t.0