In June 2008 while at the Stratosphere Casino I observed a phone card vending machine with this picture on it:

Wow! A new one! I put my money in and this is the card that came out:

“I have this one, %#^*!” I muttered as I put it away.

When I got back home I looked at the two phone cards side by side and discovered one was dated 2006 and the other dated 2007. Here’s the one dated 2006:

Here’s an enlarged portion of the dates on both cards:

Sometimes I use a magnifying glass to search for differences between cards.

On Jim Silva’s Phone Card site he has a 2008 version:
http://www.strikeguide.com/pcg/phonecards.htm

Here’s another Stratosphere phone card dated 2002. I bought this in June 2003 from a vending machine:

Here’s an elongated quarter:

Sorry no traders.