Identifying Doubling on a 1979-D Cent and Its

"Flat and Shelflike"—Identifying Machine Doubling

A photo of a 1979-D 1-cent coin was posted to an online coin collector community with the question, "Should I keep it or get rid of it?"

In response, several participants suggested that the doubling visible in the photo was "Machine Doubling (MD)." One user pointed out that the doubled areas were "flat and shelflike," commenting that this was not a valuable type of doubling. Another opinion noted that prominent machine doubling was also visible on the word "LIBERTY."

An RPM Claim and the Limitations of Photography

On the other hand, the possibility of it being a Repunched Mintmark (RPM) was also raised. However, members agreed that it was impossible to be certain from the quality of the posted photos.

The original poster claimed the coin was an RPM and also had doubling on the "R," "U," and "S" of "TRUST." But they explained they couldn't take a clear enough photo to prove it due to the poor quality of their smartphone camera. One participant suggested using an inexpensive USB microscope.

Value as Copper Rather Than as an Error

The discussion extended beyond the presence of an error to the basic value of the coin itself. One participant pointed out that the best reason to keep the coin was its copper composition, used until mid-1982.

Specific information was shared that their own Local Coin Shop (LCS) buys copper Lincoln Memorial cents for 3 cents each, three times their face value. Another participant also recommended keeping the coin, noting its good condition with much of its red color remaining and minimal wear.

The Conclusion: It's About Whether the Owner Likes It

Amid the technical discussion, one participant stated, "In the end, it's about whether you like it." They noted that while some might dismiss it due to machine doubling, the coin's good condition and copper composition are worthy of appreciation.

They encouraged the poster, saying, "Don't worry about what the naysayers say—keep it." This exchange demonstrates that a coin's value is derived from various aspects—not just the presence of a rare error, but also its material, state of preservation, and the individual collector's personal attachment.