Made from 1956-63. Unless you find one on the web, your best bet is to go to Remington.com and request a manual.
Blue Book of Gun Values
Tough question, the Remington model 550 is a .22 rifle not a 12 gauge shotgun.
remington wingmaster 16 gauge
what is a remington 20ga shotgun patented 1891,1903,1904 worth?
Remington
Take it to a gunsmith.
Remington makes a industrial 8 gauge kiln gun.
Remove stock from shotgun
Visit the Remington web site.
$300.00
sawed-off double barreled 12 gauge Remington shotgun.
Best to ask a gunsmith for help.