Posted by Drew Hause on November 1, 2016, 5:19 pm, in reply to "L.C Smith 28 may 1901"
Peris: May 1901 is one of the patent dates. Your ejector gun was made in 1921, and the grade is indicated by a letter (or 'Field') underneath the SN, or look around here at the post-1913 series grades http://www.lcsmith.org/shotguns/grades.html