Curved Clip Error Coin




Curved Clip Mint Error Coin: 1978-D Penny

A curved clip mint error coin is a type of numismatic error that occurs during the production of coins. In other words, a 1978-D penny curved clip mint error refers to a portion of the coin’s circumference being absent. This is due to a misalignment during the blanking or cutting process.

1978 penny error

Furthermore, the blanking process involves cutting round metal discs, called planchets from large sheets of metal. Occasionally, the cutting machine may malfunction or experience misalignment. This results in irregularly shaped planchets.  Moreover, the irregularly shaped planchet used to strike a coin, creates a clipped mint error.




Note the Crescent-shaped Indention

Essentially, a curved clip mint error is named because a missing portion of the planchet creates a curved or crescent-shaped indentation. The location and size of the curved clip can vary, but typically affects a small segment of the coin’s circumference.

1978 penny error list
Curved Clip Mint Error Coin Value

The value of a curved clip error coin may vary.  Moreover, it depends on several factors, such as the severity of the clip, the rarity of the coin, and the demand among collectors.  Additionally, the more pronounced and larger the curved clip, the more desirable the error coin becomes.




To determine the specific worth of a curved clip mint error coin, have it authenticated and appraised by a professional coin grading service or a reputable numismatist.  For a small fee, they’ll assess the coin’s condition, rarity, and market demand to provide a valuation estimate.

curved clip error coin lincoln penny error
Note the Blakesley Effect

The Blakesley Effect refers to a specific type of error that can occur during the minting process of coins. It’s named after a man named Blakesley, who first described this phenomenon.

mint error coins to look for

The Blakesley Effect specifically refers to the raised rim formed along the clipped edge of a coin.  A coin struck with insufficient force or misalignment, displaces the metal pushing it upward.  This causes the formation of a ridge or rim along the clipped area and a flattened area opposite the clip.




Coin collectors find these errors intriguing due to their unique appearance and the circumstances during minting process.  List your own mint error discoveries on Ebay by observing how others have listed theirs.

Curved Clip Error Coin 1978 penny errors

If you’ve found a clipped error coin you think is valuable, then consult with experts in the field to get an accurate assessment of its worth. Online coin groups such as coinauctionshelp.com are extremely valuable resources to be aware of.

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Lincoln Cent Floating Roof & Missing Designer Initials

1970 D Lincoln Cent Floating Roof & Missing Designer Initials Penny

1970 Lincoln cent errors and varieties exist!  For instance, observe the floating roof and missing designer initials on a 1970-d Lincoln Memorial cent.  Moreover, this anomaly is caused by an over-polished die. Another term for this mint error is struck-through grease coin error.

1970 D Lincoln Cent Floating Roof Missing Initials

Additionally, this can happen on any date of any Lincoln Memorial cent.  Moreover, it’s not an actual error on the die.  However, it’s caused by a United States Mint employee repurposing the die to sustain the life of a die by using polish to remove clash marks.  Therefore, it is a mint error.




Most Valuable Floating Roof Missing Initial Pennies

Furthermore, specimens display a floating roof and missing FG designer initials. Moreover, while these are nice to find and sell for a few dollars, the ideal specimens have both the floating roof and no trace of initials.  Additionally, specimens in mint state condition are worth more than face value!

floating roof penny

Arrows note die chips visible on the first and last two pillars of the Lincoln monument.    1970 D Lincoln Memorial Cents with a floating roof and missing initials have asking prices of a few dollars and up on Ebay.

1970 penny errors
Always Get More Than One Opinion

If you have unanswered questions about your Lincoln Cent with missing initials and floating roof, you can always join online groups or coin collector communities such as the NGC Coin.   Furthermore, visit LincolnCentForum for more opinions.




Coin searching and collecting is an excellent activity for beating boredom.  Purchase a coin collecting kit.  Additionally, invest in a coin microscope,coin scale and coin sleeves online or at your local coin shop.  

Check out a 1970 S Large Date penny.

Furthermore, an introduction to a healthy hobby is always an excellent gift.  Moreover, the coin hobby is an interesting topic for anyone in need of a new activity to focus on.

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