i have a black powder 6 shot single act.Fillipietta.36cal.sn.#177586 does anyone know anything about.?
From the bit you have provided , it is a .36 cal BP revolver made by Pietta in Italy. Could be an 1851 Navy copy ( octagonal barrel) or 1862 Navy copy ( round barrel).
It would help to know if it is brass or steel frame and barrel length.
In solid shooting condition I would ask $150-175.00 if a steel frame and about $25-50.00 less for brass framed guns.
Parts are readily available and they are fun and cheap to shoot.