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You are here: Experts > Shopping > Coin Collecting > Coin Collecting > Germany Rentenpfennig
Expert: Brad Swain - 11/8/2009
Question
Hi, I recently noticed one of my Germany coins has what looks like an error. I couldn't quite describe it, so a photo was included. Almost the entire coin looks like a repunch, restrike or something. I thought there were no error coins for this coin type? Is this a fake? It's almost a perfect impression on most of the front of the coin and the back of the coin isn't like that at all. Perfect strike. It's 1924f 5 rentenpfennig. Any info would be great, thanks.
Answer
Hi Kellie, this is machine doubling, or strike doubling, a form of doubling which appears on a coin and is easily confused with doubled die strikes. On a true doubled die coin, the doubling comes from a mistake in the process used to make the coin die itself. In mechanical, or machine doubling, the doubled image results from mechanical issues during the striking of the coin, such as the coin shifting during striking, or the die itself being jarred out of position as a result of vibration or improper coin press maintenance. Mechanical, machine, and strike doubling are all considered by purists to be forms of damage, and are therefore not collectible as an error coin.
I think they are interesting though.
http://www.google.com/search?q=machine+doubling
There were 29 million of these aluminum-bronze German 5 rentenpfennig minted in Stuttgart (F) that year and collector value may be worth about .10 with heavy wear to around $1 with moderate wear to maybe $5 with light wear.
Brad
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