The 22 caliber rifle stamped 41-10319771-22 by Sears Roebuck was likely manufactured in the late 1960s to early 1970s, as Sears sold firearms under various model numbers during that period. As for restoration, its worth depends on its condition and the interest in vintage firearms; if it's in poor condition, restoration might not significantly increase its value, but if it's a collector's item, a restoration could enhance its appeal. Evaluating similar models' market prices can provide a clearer idea of its potential value post-restoration.
I have one and it is a 7x57 caliber is stamped on the left side of the barrel.
the caliber is stamped on the gun.
The caliber of a Philadelphia derringer with Jukar 054167 Jukar stamped on the barrel is not known. There isn't enough information to determine what the caliber would be. A gun collector would be a good person to ask.
caliber and maker's name
The caliber of the firearm should be stamped on the barrel.
Unknown.
Usually caliber and/or serial numbers.
Well, it depends on what you mean. The caliber is "determined" at time of production based on whatever caliber the manufacturer wants it to be. The caliber can be determined later by looking on the barrel. The caliber will almost always be stamped somewhere on the barrel.
You will need to take it to a gunsmith to find out.
The manufacturer is normally stamped on the firearm next to the model, caliber, and serial number.
1895-1910.
No. Only use what is stamped on the barrel.