The early "The Sterlingworth Company" guns had a rounded front for the side panel of the frames. According to my list of observed specimens that was changed to the same pointed profile as the graded guns by #51,301.
The gun pictured in The Sterlingworth Co. catalogue has the rounded profile.
The guns at the $25 price point before WW-I were all quite good quality. Parker Bros. introduced their Trojan Grade in 1912, at $25.50 but by the next price sheet it was $27.50. The Trojan and the Sterlingworth stayed at these prices into 1916, then the inflationary pressures of The Great War began forcing the prices up with Fox's Sterlingworth going to $30. By 1917 it was up to $37.50. In early 1919 it was $47.75 and by late 1919 it was $55, as was Parker Bros. Trojan. In 1922 A.H. Fox Gun Co. dropped the price of their Sterlingworth to $48 and for 1926 they dropped the price to $36.50, and eventually sold about 140000 guns. Parker Bros. kept the price and the workmanship of the Trojan in the $50 range and eventually sold just over 33000. Fox's Sterlingworth did offer ejectors, a single selective trigger and a much greater variety of barrel lengths than Parker's Trojan.
