In order to determine the age of Lefever shotgun, the serial number must be known. However, Lefever shotguns were only made and distributed between 1885-1916.
1896.
1927.
Examine with high power magnification.
If it doesn't say Lefever somewhere on the gun, I don't think you have a Lefever.
You've got too many numbers there. sales@countrygunsmith.net
Your shotgun was manufactured in 1923, by Ithica Guns which took over the Lefever brand when they acquired the corporation in 1916.
According to doublegunshop.com the year of mfg would be 1922
LeFever is one.
Ithaca Firearms manufactured the Lefever Nitro Special shotgun with serial numbers between 101600 and 119899 in 1922.
The average cost of a Lefever Nitro Special shotgun at auction is $650. This amount may be higher or lower depending on the condition of the gun.
The Lefever was mfg. in 1935.
Made in 1925