Welcome to The Sentry Construction Company $50.00 Game!

Here's how it works:

Each game is a month long, and every Monday of each month we will place a new puzzle on a page hidden on our web site. Find the hidden link, go to the hidden page, and try to answer the puzzle correctly. When you have all the correct answers for the month, email them as fast as you can to contest at sentry construction dot com !
The first person to email the most correct answers will win a gift card or gift certificate worth $50.00! Are you ready? Here goes!

Contest 59, Week 4

My Uncle Ralph bought a coin in the flea market for 10 dollars. The coin has the head of Emperor Augustus and is dated 27 B.C. The other side is illegible. It is a fake, however. What proves that it is not a true ancient Roman coin?