Hopkins & Allen began business in 1868. Unfortunately, they closed in 1916, and there are very few serial number records. The XL revolvers range from the 1880s up into the early 1900s. Please do not attempt to fire it with modern high speed .22 ammo- it was not built for that.
10-1000 USD depending on specifics.
25-75 USD
Colt Model 1877 "Lightning" Double Action Revolver in caliber .38 Colt and the similar revolver model "Thunderer" in caliber .41 Colt.
It depends on the make and model. Is it a double action or single action revolver?
Blue Book of Gun Values
colt made single action revolvers in 1884. Do you mean 1984 ????
Need to know the model type to answer.
Would need a model name to answer.
Double action revolver
10-100 USD or so
0-150 USD or so
if double action revolver it was probably made about 1923