At this point, it's been about a month. I got those first two a few days apart, and while the local change machines are now flooded with Kisatchie quarters -- I must've gone through close to a roll of them by now just in change from Kroger -- I haven't found any more of this variety. At this point, I can't resist the temptation to page @mikediamond to the thread. Is this something that's worth pursuing for variety recognition? If so, how do I go about it? I was pretty sure it was a die issue, not PMD, and having two identical specimens certainly reinforces that. I've been hearing about doubling errors on the Homestead quarters all over the place, but nothing on these yet. Am I the only one who's found them? Or just the only one who cares?
I work at a bank and see tons of quarters. Have been looking for your variety and haven't seen any. Maybe you got something good...
It's a "field-restricted struck-through" error. A gritty paste was smeared across the field portion of the die face, probably by a dirty feeder. I've reported on this error type in Coin World: http://editions.amospublishing.com/wdcn/default.aspx?d=20131118&pagenum=68&s=field-restricted
That wouldn't produce multiple, identical errors. And the lines would affect the devices in addition to the field.
Yes it would, and it does produce identical errors. The gritty paste clings to the die face and remains intact through several strikes at least. The gritty paste is confined to the field because only the field picks up the material as it's dragged across the die face. Please read the article I linked to.
Thanks very much for the article link. The phenomenon you describe there certainly resembles what I'm seeing on these coins, but the field disturbances appear distinctly in relief, not incuse, making me think that it reflects damage already done to the die. It could be, though, that the disturbed area as a whole is incuse, with some areas inside it standing out in relief. I'm going to see if I can get some better images with strongly oblique lighting. Time to find the extension rings...
It would not be surprising if the field-restricted struck-through error coincided with die scrapes travelling in the same direction. That's the case with one of the coins featured in the article. If this is what's going on with your coin, then you'll have a mixture of raised and incuse lines/streaks.
If my technique's up to it, I'm going to get identical photos of the two coins and do an image subtraction to pull up differences between the two. I'd expect die gouges to be identical, but struck-through areas might have at least some variation. I'll follow up here after I give it a shot.
It seems like more and more error or varieties coming out from the "P" mint. Somebody over there need to do a better job in taking care of them coins. But of course then there will not be much varieties anymore.