I would need to know the manufacturer of your 77B shotgun to be of any help to you.
These where made from 1955-1971. If in 90% condition about $130.
YEAR 1973
google images
no
i have been trying to find info on a Gibraltar 20 gauge shot gun that i recived. love to find a value. I cant find any thing.
1976
Not necessarily. Take it to a gunsmith to find out the correct caliber/gauge.
Do an internet search with the words Brazil, shotgun and 20 gauge'
As much point as there is in any variety of gauge or calibre. Some people might find the .20 Gauge more comfortable to handle; especially those of smaller stature.
i have a model 200 20 gauge and i belive it was made in 1918
1904
1910