Impossible to answer without a detailed description of all markings and features.
Try Mid West Gun Works.
Full choke.
Not unless you have to change the choke tube.
They are for the choke wrench most likely. Choke markings are usually on the body of the tube.
What is the value of a Spencer Gun Company 12 guage choke shot gun serial number A203136?
Either a full choke,or extra full choke shotgun barrel.
To determine different shot patterns
The TIGHTEST choke (which is smallest) is the Extra Full. The largest (no choke at all) is known as a cylinder bore.
I am a gun dealer in Asheboro, NC (Franks gun and pawn). Yes, the Baikal choke tubes will fit. This gun is made by Baikal for Remington. It used to be imported under the EAA name. You can also get tubes at Colonial choke tubes.
Shotgun with a skeet choke.
Manual choke
I have a belgium 12 gauge browning shot gun with the serial #B67119. I am trying to find out what type or size choke it has