what age serial # 917400
The value of an Erma-Werke handgun actually depends on a number of things. Some of these things include the age and condition of the handgun.
Louis Daniel Armstrong fired a pistol at age thirteen
No published sn data.
You specifically have the Iver Johnson TP-25 pistol. These were produced on US-made frames from the Iver Johnson location in Jacksonville, AR with internal parts produced by Erma-Werke in Germany. Your gun was produced in the late 1980's.
Impossible to answer without a detailed description of ALL marks.
What model?
18 years
I don't recall Will Smith ever making a pistol.
That depends on where you are, and what you are doing with the gas pistol. And, if you are under age, if you have the permission of your parents to do this.
The suggested minimum age for owning a BB pistol gun is eighteen in the UK. There is no minimum age in America but people under fourteen need to be supervised by an adult.
The PY in the middle of your serial number dates your pistol to 1982.
You have to be at least 21 years old to legally purchase a pistol in the United States.