There were 6 grades, E D C B A AA. Serial should be 2000-2500. Grade F added in 1889. 1892 Ideal or G grade added. 1899 I and DS were added. Grade should appear under forearm stock. Must know if barrelled in damascus or krupp steel? Company was sold in 1906. Must know single or double trigger and if any engravings. Respond for value. Also, looking for Fox Sterlingsworth, 1927! (Avid side by side collector)
The Lefever was mfg. in 1935.
If it is a double, remove barrel and you will see it along with serial #.
around $6000
1927
Requires professional appraisal.
Turn of the century.
The best that I can do is say that the Lefever Nitro special was made from 1921-1948.
Blue Book of Gun Values
To get a parts breakdown you would need to take the shotgun into a gun store. The store will be able to provide an estimate, or order new parts.
Lefever made several models through three different versions of the company. Not enough information.
The shotguns were manufactured by Ithaca from 1921 through 1947. Yours was manufactured in 1928.
Open the action. It is stamped on the water table, which is the flat part of the frame where the barrels sit. sales@countrygunsmith.net