No records for this importer of firearms, and they are now closed. Sorry-
100 USD
About 100 USD
About 100 USD
I suspect this is a foreign firearm imported by that company. Unless it is some special target rifle, a 22 single shot is probably only going to bring $75 to $100 in used condition.
This is not the same company as Firearms International, Inc. of Houston. Firearms International, Washington, DC, doesn't get much space in the reference books since they didn't manufacture many guns, mostly imported rather inexpensive pieces. The country of origin should be marked someplace on the barrel or receiver. Most utility single shot .410's in working condition are worth $75 to $125, but since it will be difficult to find repair parts if these should break, it may be hard to sell for half that much.
Firearms International was an importer, now out of business I believe. It is unlikely that they would have actually marked the gun with their name before these markings were required in 1968. There are probably other markings that may identify the actual manufacturer. Double Action refers to a revolver mechanism and I have no idea what you mean by a doubleaction trigger on a rifle.
FIC was an importer. 50-100 maybe
Single Action
No, Denzel Washington is not single.
No, Kerry Washington is not single.
From the late 1960s up to 1971 when FI folded up, and import of these rifles was taken over by Garcia.
I have the same type of rifle and the only markings on mine are FIREARMS INTERNATIONAL CORPORATION WASHINGTOND.C. 20022, but I haven't seen any type of serial numbers.