Thanks for the info Merril...looks like mine is one of the rarer 105s..
It also has a number on the right side of the barrel that doesn't match the serial number on the frame..it is 583.881
From your other site, it looks like mine is one of these..my frame looks anodized so I guess it is aluminum. But my box has a catolog number of 2257. I guess it would be different for JC Higgins.
Sentinel Snub has a 2.375 barrel with round butt grips
caliber Barrel Grips Sights Cat From Thru and From Thru
.22 Short, long, Long rifle 2.375" Round butt brown plastic Fixed Blue 9344 1967 1969 1972 1973
.22 Short, long, Long rifle 2.375" Round butt Ivory colored plastic Fixed Nickel 9345 1967 1969 1972 1973