When did they start requiring serial numbers on guns?

1968 In 1968, the Gun Control Act (GCA) imposed numerous additional requirements in the arena of gun manufacture. As per the GCA, all firearms manufactured or imported into the United States are required to bear a serial number.

Where is the serial number on Smith and Wesson?

Revolvers - The official serial number is located on the bottom of the butt of the frame. Some revolvers also have the serial number located on the inside of the frame, in the yoke area.

Where is the serial number?

Android tablet Settings feature Option one: Open Settings > About Tablet > Status > Serial Number.