Find a copy of the company history written by Brophy and look it up in one of the many sn tables.
A marlin lever action 30-30 rifle can hold fife shells in the magazine and one in the chamber.
It will fire the 30-30 win.marked ammo.This will be visable on the box of cartridges that you will buy.
The Marlin 336N, a variation of the Marlin 3030 model, was produced starting in 1955 and continued through the early 1980s. It is a lever-action rifle chambered for .30-30 Winchester. If you are looking for a specific year, more context or details about the rifle's serial number may be needed to pinpoint the exact year of manufacture.
I would check the lower tang,under the lever.
Try Proofhouse.com
Millions made.
The rifle is a marlin 336. Serial number is located on the lower tang under the lever.
150
Blue Book of Gun Values
100-1000 USD or more depending on specifics.
Without knowing what is jammed, and not being able to see or examine your rifle, our only answer is to take the gun to a gunsmith.
Browning has made centerfire lever action rifles in various calibers over the decades.