Near the breech.
1864-1935
You may have to break the shotgun down in to the barrel section and the receiver section first.Look under the barrel section on the flat just ahead of the lug for the serial number.
The serial number on a Stevens model 940 16 gauge shotgun is typically located on the underside of the receiver, just ahead of the trigger guard. In some instances, it may also be found on the barrel, near the hinge or on the bottom of the barrel's lug. If you're having trouble locating it, ensure the shotgun is unloaded and examine these areas closely.
That is the rear end of the barrel where the shell is inserted.
Made by J Stevens Arms between 1920 and 1948.
Check the frame and barrel
how old is my Iver Johnson single barrel shotgun champion model 3578 C with a 12 gauge choke bore barrel and lug forged in one and approximate value .
Iver Johnson is most often associated with the HERCULES trade name. sales@countrygunsmith.net *If that statement marked on the gun actually says "barrel and lug forged in one piece" it is a Stevens. If it says "barrel and lug forged in one" (exactly the same except no "piece") it is by Iver Johnson Arms and Cycle Works.
CHeck the barrel and receiver.
To disassemble a Lefever shotgun, first ensure the gun is unloaded and the safety is engaged. Open the action and remove the forearm by pressing the release latch, then slide it off the barrel. Next, unscrew the barrel from the receiver by turning the barrel lug counterclockwise. Finally, you can access the internal components by removing the stock, typically done by unscrewing the stock bolt located at the rear of the receiver. Always refer to the manufacturer's manual for specific instructions and safety precautions.
A shotgun barrel with a cylinder bore choke.
yes a rifled shotgun barrel or smooth shotgun barrel