100-300
The manufacturer is normally stamped on the firearm next to the model, caliber, and serial number.
By model, caliber and serial number.
There is no model number. The model name is Cobra. Are you talking about the serial number?
Virtually impossible to determine caliber by just the serial number.
No such S&W model number.
No way to know the caliber from just the serial number
Model numbers were not used before @ 1957.
Basically impossible to do with just the serial number.
Impossible to answer without knowing what caliber it it.
Model 581.
Are you sure of the model number?
Llama made both semi auto pistols and revolvers in .22 caliber. The pistol (Small Frame Auto) looks like a scaled down 1911A1 .45 Auto. There have been problems reported with the quality/hardness of steel, and greater wear than expected. Llama also made double action revolvers in .22 caliber. Value will depend on which model and condition, but may range from about $150-$300.