That marking just means "Special Steel". You need to find a model name or number to determine what it might be worth.
Need model information. You listed the barrel marks on a shotgun that are on many different models. Also need condition and details of the gun.
100-1000 usd
yes
Value is too difficult to be accurate without seeing the gun. Condition which includes the amount of original finish and original configuration will determine value. Recommend taking it to a gun shop for appraisal.
Impossable to answer without a description of the condition of your Browning shotgun,and the serial number.
They haven't. Special orders are still an option.
You will have to call Browning to find out.
No such thing as a 22 Shotgun.
50-350 usd
I am trying to find out the value of my Browning Acier Special C 12 guage Shotgun KG 8663 Serial number 307368
Your browning auto-5 standard 16gauge shotgun was made by FN of belguim for browning in 1953.
look under the forearm
50-500 usd
No such model number.
Japan, Portugal and Belgium
Your browning 16ga was produced by browning in belguim in 1949.
Your browning auto-5 shotgun was made by FN of belguim for browning in 1957.