The company that made it or the dealer that sold it to you can find out what kind of pistol and know the calibur.
Benjamin made this model from 1946 to 1985, but did not start serializing them until 1957. I also have a Benjamin Franklin that has no serial number. Before 1957 it is not possible to set an exact date. Just know it's OLD. The 137 is a .177 caliber pellet pistol the 132 is a .22 caliber pistol and the 130 is a BB pistol.
Value will depend on exact configuration, overall condition, finish, box, manual, accessories, serial number, barrel length, etc.. Range could be from 25 USD to multiple thousands of USD.
$425 depending on exact model, caliber and condition. Serial number has no bearing on any of that.
$425 depending on exact model, caliber and condition. Serial number has no bearing on any of that.
Impossible to answer without the exact model and caliber.
The exact value of a Browning 22 caliber pistol with gold trigger is actually dependent upon a number of factors. Some of these factors would include the gold content, year and condition of the pistol.
Jukar was a firm that made barrels for inexpensive modern reproductions of black powder firearms (in Spain) Value will depend on exact model and condition, but typically run $100-$150.
$20-$100, depending on exact model and condition.
Impossible to answer without knowing EXACT model and serial number.
$150-$250, depending on exact model and condition.
$50-$300, depending on exact model and condition.
Impossilbe to answer without knowing the exact model.