Interesting Bombay Hook Quarter - 2015-P

[jay4202472000]

I had 2 of these in my pocket today. When I first saw it I thought it was a lathe line. Then I remembered seeing something similar on error-ref.com. I looked & found it. Here's the link: http://www.error-ref.com/tiny-circle...s-and-spirals/

Kinda crazy to me. If you'll notice, you can see the continuation of the circle in the lower crevices of the grass (from about 9:00 to 1:00). Pretty interesting I think.

[willbrooks]

That sure looks like the same kind of anomaly. Is it centrally located? I can't remember this design off the top of my head. If it isn't, then that would blow up any lathe line theory in this case. Interesting. Anyway, even though you posted in the correct forum, I moved it to error attributions anyway so Mike D will see it.

[WxMan]

That is interesting. I'm curious as to what Mr Diamond has to say about it.

[jay4202472000]

It appears to be dead in the center, but most of the examples on the link are centralized.

[willbrooks]

It appears to be dead in the center, but most of the examples on the link are centralized.

Right. That is why we thought it could be associated with the lathe. I have never seen any that weren't in the center, but the error-ref page seems to suggest otherwise. We'll have to see if Mike has any further ideas on it.

[jfines69]

Looks like a pressure ridge formed from the die blanks point when it was hubbed into a working die... That or the UFOs are back at the mint

[mustbebob]

The Nebraska quarters had the high/low leaf coins with the circle/ lines. In addition, circles have also been found on 1998, 1999 and 2004 cents. The plot thickens.

[WxMan]

So does that make the circles on the reverse of the Nebraska quarters "crop circles".

[mikediamond]

Yes, this is the same phenomenon. First time I've seen these mystery circles on a quarter dollar. Whether they're related to concentric lathe marks is unclear. A few of the circles do show faint outlying rings, which would tend to support that hypothesis. But most are isolated.