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.
Impossible to answer without more information and what you think "cocking indicator" means.
"cocking" translates to, "armamento" in Italian.
The serial number is hidden on the frame under the grip. Removal of the grips will expose the s/n of you gun,then it can be dated. A great source of information on Iver Johnson firearms is The book "Iver-Johnson Arms & Cycle Works Firearms 1871-1993" by W. Goforth
Your DW is worth $150 in absolutely mint shape to a collector. They were poorly crafted firearms and the cocking mechanism was prone to early wear.
Edward Cocking was born in 1931.
Robert Cock died in 1871.
Robert Cock was born in 1801.
That would be the trigger on most firearms, the slide on an automatic pistol, and the hammer on either an automatic pistol or a revolver. You also pull back the bolt on a rifle, and sometime the cocking mechanism on a shotgun.
"cockin' on ya" means you are cocking your gun on someone, like you are going to kill them
Winchester but I'm not sure exactly what model. The Winchester has a cocking lever built into the trigger guard. His rifle had a modified cocking lever that was larger and allowed fast cocking.
turtles
cocking a gun is when you pull the slide of a gun back and forwards once to get a bullet into the chamber to fire