By the serial number. Call S&W
Impossible to answer without a serial number.
I cannot assign a year of manufacture without you providing a serial number to your Smith and Wesson model 28.
Impossible to answer without a serial number.
Impossible to answer without a serial number.
Your question cannot be answered without you providing the serial number to your model 586 Smith and Wesson revolver.
Impossible to answer without knowing what caliber it it.
No way to answer without a serial number.
Impossible to answer without knowing the model.
No way to answer without the serial number.
No way to accurately answer without the serial number.
Impossible to answer without the serial number.
Impossible to answer without a serial number.