The Lefever was mfg. in 1935.
If it is a double, remove barrel and you will see it along with serial #.
when was the carolina arms 16 gauge single barrel shotgun made
1901 single barrel shotgun, washingtion
Turn of the century.
The best that I can do is say that the Lefever Nitro special was made from 1921-1948.
How much is a 16 gage single barrel shotgun model 350A Revelation