1898 Silver Dime with "313" stamp in neck

The 1898 Silver Dime with "313" stamp in neck is a Barber Dime dated 1898 from the collection of Mike Alaimo.

Background
Not much is known about why "313" is stamped in the neck of the Barber Dime but there is speculation. A number of these have been seen over the years dating back to the late 1800s. Random (or seemingly random) numbers punched into coins. They may be 'test' pieces for key fob punchers used in prisons, for police, or a number of other purposes. Each piece is likely unique (or nearly so), but since there's no 'purpose' in them and there's no indicator as to where or when they were made, they generally sell for a rather nominal amount...a few dollars.

Countermarked coins were common in the 19th century. Marking can mean that the coin is fit for circulation or has been revalued. It was also very common for merchants to advertise their services by stamping coins, called Counterstamped coins, and passing them back into circulation.