This is an interesting story. The gun IS Belgian, and it is a 'C Parker', but it is NOT a Browning. Has nothing to do with Browning. In the late 1800's, from about 1880 through 1910, various major distributors such as the HD Folsom Company imported thousands of inexpensive shotguns from Europe (primarily Belgium) for sale by the various large mail-order catalog hardware stores of the time. Sears sold them, for instance. They had neat names designed to impress the typical unsophisticated Midwest or frontier buyer, such as "The Interchangeable." Some retailers wanted to play on the more established gunmaker names so we see these shotguns marked with "SAM HOLT" (not Sam Colt, even though Colt Firearms were never marked that way), "BARKER" instead of Parker, and "C PARKER" (also to confuse with Charles Parker and subsequent Parker Brothers). Parker Brothers shotguns and the early Charles Parker shotguns are considered some of the finest American made shotguns ever and are highly collected well into the six-figure price range. Your gun, however, is NOT one of these. On the underneath of the barrels, between the barrels and the frame, you should see the telltale 'ELG' proofmark indicating Belgian manufacture. The finish on the barrels is probably NOT actually Damascus, but a version of twist construction. Value is as a decorator piece only - these guns are universally considered unsafe to shoot. $200 or so, if in top condition. email@example.com
No such thing as a 22 Shotgun.
Japan, Portugal and Belgium
No such model number.
Browning offers history letters for @$40 USD
Your browning auto-5 shotgun was made by FN of belguim for browning in 1957.
Your Browning auto-5 shotgun with the prefix of 70s to the serial number identifies that your shotgun was made in Belgium for Browning in the year 1970.
Your sweet sixteen browning auto-5 shotgun was made by FN for browning in 1963.
If your browning 16ga shotgun is a auto-5 then it was made by FN of belguim for browning in 1927.
It will be marked on the receiver/barrel.
This is best left to a gunsmith.
The barrel will be marked "Made in Belgium"