While mindlesly googling the web I came across this.
Enjoy.
http://www.courant.com/news/local/hc-sa-railroadties1aug23,0,895932.story?coll=hc-headlines-local
When Punching Train Tickets, Railroad Conductors Leave A Mark Uniquely Their Own
August 23, 2005
By Mark Ginocchio, Staff Writer On Metro-North Railroad, hole punches are a lot like snowflakes. No two are alike.
“This is our signature,” says Thomas Wyen, an assistant conductor on the New Haven Line.
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He unleashes his hand-held silver puncher faster than a cowboy in a Wild West shootout. With three quick clicks, Wyen showcases his prized punch on a sample ticket.
"Have you seen ‘Lord of the Rings?’ " he asks. “Because I think it looks like the sword.”
He holds the ticket to the light, and the hole does look like a sword – a moon-shaped blade guard and a rectangular handle – although likeness to anything in the “Lord of the Rings” films is debatable.
“I think mine looks like a little airplane,” conductor Tom Wnek says. “We’re guaranteed that no two conductors have the same one.”
That’s because a conductor’s hole punch is a vital form of identification for the railroad. Conductors use the punches to track tickets they’ve checked. If a passenger says they’ve already had their ticket punched, but the shape left behind doesn’t belong to anyone working the train, he’ll know someone is trying to cheat the railroad, Wyen says.
The railroad’s revenue accounting department also keeps a record of the shapes issued to each conductor. That way, the punch mark can provide evidence in case of employee misconduct.
Ticket punching began in the 1860s and is unique to railroads in the United States, Metro-North spokesman Dan Brucker said. Once conductors were able to request punch marks, but now they are issued at random.
Ensuring each punch is unique is a challenge for