Forehand and Wadsworth was a continuation of Allen and Wheelock and Allen and Thurber companies. Forehand and Wadsworth married the daughters of Ethan Allen, president of the two predecessors and assumed control and changed the name of the company when Ethan Allen died around 1871.
They manufactured a large assortment of handguns, many of which were in the "Suicide Special" and "Bulldog" categories from 1871 to 1901.
Forehand and Wadsworth was purchased by Hopkins and Allen Firearms Company in 1902.
Your Russian Model was probably manufactued in the 1880-1891 era. No records survive to indicate serial number, date of manufacture corelation.
Your pistol was made in the black powder era and cannot be considered safe with modern ammunition, even if you can find some.