I also have a Lefever Nitro Special 12 guage, serial #337... which was made between 1936 and 1937, and it's also a single trigger (which I think is rare). Yours was made around 1929. While these are not expensive guns, they are considered high grade American made shot guns and they still shoot great to this day. Lefever made some of America's most collected shotguns as did the Ithaca Gun Company which made your gun. But the double guns made by the Lefever Arms Company are much more rare and much more valuable. They can sell for thousands, and even hundreds of thousands for some of the rarest. The Ithaca Gun Company made about 236,000 Nitro Specials between 1921 and 1948 after they acquired the Lefever name. They came in different gauges but the most common was the 12 gauge with a double trigger. If it were a 16 gauge, it would be worth about 20% more. I'm not sure how much the single trigger adds if anything. Mine is in good to very good condition and I think it's worth around $450. The fact that yours is older should not make much of a difference. The determining factor is the condition. If you do a little research on the internet you can find out everything you need to know about determining the condition and value of your gun. That's what I did after I inherited mine and I've been an admirer of collectable side by sides ever since.
The Lefever was mfg. in 1935.
The best that I can do is say that the Lefever Nitro special was made from 1921-1948.
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.
1927
It is found under the breach below the barrel
Ithaca bought Lefever and that gun is the Lefever Nitro Special. My gun has a pointer on it and 2 ivory beads, one midway on barrel. Also my gun has a rosewood stock on it. Special made gun for somebody. Lefever gun had ducks flying over a marsh on receiver.
Your Lefever Nitro special will range in price from 300-450 dollars,based on your shotgun having between 60%-90% of its original finish remaining and a good set of bores.
This was apparently prior to the acquisition of Lefever by Ithaca, since it appears that the first Ithaca Lefever serial numbers contain 6 digits (Lefever Nitro Special - 1921)
To disassemble a Lefever Nitro Special, first ensure the shotgun is unloaded and the safety is engaged. Open the action and remove the barrel by locating and turning the barrel release lever, usually found at the front of the receiver. Once the barrel is removed, unscrew the stock from the receiver using the appropriate tool or screwdriver. Finally, you can access the internal components for further disassembly if needed, but be cautious and take note of the assembly order for reassembly.
My brother can tell me when it was made. And he is never wrong.
Mfg 1925. Serial numbers are stamed on the barrel flats, on the water table (receiver) and on the forend. They should all match.
An early model Lefever single-barrel 12-gauge shotgun with a 30-inch plain barrel can be found for sale online for $300. This is the price for one that is in excellent condition.