Serial #153126 shows 1907 but there is an F under the number. This number is on the water table Fore arm metal and barrel flats on the bottom side of each barrel is stamped C 4 over top of 7 W&R . On the top side of the barrel is stamped Royal Steel Hunter Arms Co. Makers, Fulton N.Y. Are some of the parts for this shotgun possibly pre 1907? Like Breech Balls being 3/4". Nice to see so many responses to other peoples questions.