I can say that the LeFever Nitro Special was made from 1921-1948.I do not know if the serial numbers by year of production are available in the public domain.You may have the Grade A field model due to the engraved ducks on the side.These were made from 1934-1942.Barrel length was available from 26in.-32in,of which your shotgun fits.
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.
Your shotgun was manufactured in 1923, by Ithica Guns which took over the Lefever brand when they acquired the corporation in 1916.
Ithaca Firearms manufactured the Lefever Nitro Special shotgun with serial numbers between 101600 and 119899 in 1922.
The best that I can do is say that the Lefever Nitro special was made from 1921-1948.
I have an original 16 ga. nitro special made by Lefever. The sight bead is one eighth if an inch in diameter.
I would say that with the serial number 1321XX,we are looking at your shotgun being made by ithaca(who made the lefever nitro special) in 1924.
If its a lefever nitro special, on the auction sites they,re bringing from 300.00 to 550.00 depending on condition.
If it doesn't say Lefever somewhere on the gun, I don't think you have a Lefever.
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.
The Lefever Nitro special shotgun was made from 1921-1948.During this time frame the lefever shotguns were owned by the Ithaca Firearms Company.The price range of your shotgun if it has between 60%-90% of its original factory finish remaining is from 300-450 dollars.I hope you find this info helpful.