Ithaca Firearms manufactured the Lefever Nitro Special shotgun with serial numbers between 101600 and 119899 in 1922.
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.
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.
1927
You need the services of an appraiser
The chamber length of a Lefever shotgun can vary based on the specific model and configuration. Typically, many Lefever shotguns were made with chambers of 2 5/8 inches or 2 3/4 inches. To determine the exact chamber length for serial number 66916, it's best to consult a detailed reference specific to Lefever shotguns or check with a knowledgeable gunsmith.
The Lefever was mfg. in 1935.
The Lefever 410 side-by-side shotgun with the serial number A205055 was manufactured in 1937. Lefever Arms Company produced these shotguns from the late 19th century until they ceased operations in the 1940s, and the serial number provides a way to date the firearm accurately.
The model number is on the water table directly after the serial number, usually a letter ranging from A thru I with I the least fancy.
1896.
If it is a double, remove barrel and you will see it along with serial #.
Examine with high power magnification.
1927.