You will have to contact Browning to find out.
Impossible to answer without seeing.
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
It was made in 1938
You need to call Browning.
You must call Browning for the answer.
There is no way to tell from the serial number.
What gauge and grade is it?
All Citoris were/are made in Japan, and that is not the full serial number. There are three more numbers and two letters. Value depends mainly on the features and condition. Early Citoris with fixed chokes are not as desireable as later Citoris with choke tubes. Field and Trap guns are not as desireable as Lightning and Superlight models. Based on the information you provided, anywhere between $550 and $1000.
We are not familiar with a model 22, but all Browning Shotguns use the invector screw in choke tubes. These are available at most Gun Shops and retailers of Browning guns. You can also find them online at the Browning Co Website
A 12 gauge shotgun with changeable choke tubes that fires 3.5" shells.