GEORGE WASHINGTON BOWLBY the son of George and Anna Bowlby, born 28 January, 1823, Hunterdon County, New Jersey. He died 5 February, 1878, at 54. He was a gunsmith by occupation. He died of ulcers of the liver in Pontiac, Michigan. He left a widow, Catherine.
He seems to show up in Philadelphia about the age of 25.
In 1863 the only things of value that he owned were a carriage and a gold watch.
He held patent 64941 for a breechloading rifle, May 21, 1867. He was in Pontiac at this time.
http://www.google.com/patents?id=wn4AAAA...p;q&f=falseI have nothing on the other name.
This gun obviously predates the Bowlby patent.
Pete