50-115
The Revelation 22 Model R100B caliber rifle was manufactured by Mossberg. The company Western Auto Supply is known to sell both these rifles as well as the cartridges for the rifle.
25-125 USD
100-300 or so
25-125 USD or so
No published sn data
10-125 USD or so
Can't be answered without knowing the caliber and a detailed description of all markings.
Which Model?
Marlin; depends on the barrel and loads
Mossberg
The Revelation Model 105 .22 caliber rifle was manufactured from 1971 to 1988. It was made by Marlin and marketed by Western Auto.
It is a Mossberg Model 800.