I will never understand why people come onto blogs to get advice from random uneducated morons who make up stuff off the top of their heads to answer serious questions.
"Your silver penny may be a real error this is done when a blank dime was pressed with penny dies. It is a rare example and the average Red Book value is $1,00000. A 1960 silver penny was recently sold on eBay for $90100." ~
Coined For Money (i got this off a 1-second Google search and it is a million times better answer than any of the others on this "treasure" blog.)
Don't believe everything people tell you because your brain is fully capable of decifering actual fact from made up fiction. Your coin COULD be a counterfeit, it COULD be an accident, it COULD be a promotion that was given away as a free gift for marketing purposes, it COULD be worth a fortune. The ONLY way you CAN EVER KNOW is to bring it to an actual professional who has the tools, the experience, and the connections to get to the bottom of the authenticity and value of the coin.
Would you walk up to a random person on the street to ask them for their advice on the value of your Maserati? would you expect that person to actually have any concept of the true value of your car? i think not. but people come to blogs online all the time to get advice on diseases, suicide, and all sorts of important topics!!!!!!!!!!!!!
Go to your reputable local coin collector shop and ask the person who has been in the coin industry for 30 years what they think because they will give you an EDUCATED ANSWER.
Good luck.