For any interested readers on this board.

I took the time today to remove the trigger plates, stocks and the sear axles and the sear springs from a 12 Gauge Philadelphia Sterlingworth circa 1928 and a 16 Gauge Philadelphia Sterlingworth circa 1925 and lastly a 20 Gauge Philadelphia Sterlingworth circa 1926.

I took the following measurements from these three O.E. Factory Sear springs:


















Best Regards,


Doug