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.
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.
Examine with high power magnification.
You are stupid ;b
Under trigger
Look up the Marlin shotgun with the same model number.
Contact the factory; they are still in business.
The model number should be on top of the barrel just ahead of the receiver the manufacture and model should be together.
The model number is stamped on the right side of the receiver on many Stevens products.
You will have to contact Miroku to find out.
You cannot the serial number is required.
Not marked, Model 9
24 years old. You must call Browning to find out model.