[Midnight Rose]

Sorry if this question sounds dumb - I'm still new to chip collecting - but what exactly goes into determining what an Error chip is? I'm fairly sure I understand that incorrectly denominated chips are Error chips, such as a $5 chip being incorrectly labelled as a $1. But would a chip that had a manufacturing flaw also be an Error chip?

I ask because I picked up twelve 25¢ chips from Greektown Casino last night, and one of them had two spots on the rolling edge where there was some kind of indentation from the manufacturing process. It definitely wasn't a customer- or casino employee-dropped chip, based on the cleanness of the indentation. A drop or somesuch would normally have left a more jagged, irregular break; these indentations look machined in some fashion.

I wanted to try to make a scan of the marks to include here, but the indentations are on the rolling edge, and that wouldn't scan very well. I did manage to scan the surface of the chip to compare it against an undamaged chip. The one on the right is the indented chip. And there are actually two indentations: one at about 5 o'clock, and the other, hard-to view-indentation, within the edge spot at about 7:30-ish.

Not that it matters all that much; I like the chip, damaged or not. I'm just more curious and eager to learn than anything else.

[Midnight Rose]

I managed to get a bad scan of the more visible indentation on the rolling edge; my eyes are too old to make it out from this scan, though. I had to reply to myself(!) in order to include the image here.