I don't know what would cause an effect on the coin when minting that would put the machine type or die deterioration like area on the reverse. I've put both obverse and reverse as well as a detail of the reversed where the effect is most noticable. Can anyone enlighten me on this? Thanks
Other than sloppy die clean up I have no idea whats going on here. I know that I kinda like it though! :thumb:
I agree with ya. I like it too. Haven't seen such bold die polishing marks like that before. It's a keeper in my books. I would even recommend getting it certified, why not!
The striations appear to be going in two different directions, perpendicular to one another. That's pretty cool, but I don't know if it would be worth submitting. That's up to you, Kasia. Chris
The marks were not caused by die polishing for a couple of reasons. 1 - die polishing marks are not found on the devices. 2 - die polishing marks do not crisscross. I suspect it is a case of very extreme roller marks on the planchet that were not all wiped out by striking.
Agreed but I don't see the marks being on the devices. Yes they can, although you might not call them "polishing" marks. I have seen plenty of cases of coarse "polishing" marks that crisscross on coins. Except roller marks DON'T crisscross. They are parallel and run along the length of the strip. They are also typically seen on both sides of the coin and of course running in the same direction.
The marks are plainly visible on the face, the shoulder, the lapel, the collar, even faintly in the hair. On the reverse they are visible on the legends, ONE CENT in particular, and faintly visible on parts of the memorial. Not sure why you don't see them. Correct, because they are not. Die polish marks can crisscross with die scratches or flow wear marks on the dies - or with both on the same coin. But die polish marks cannot crisscross with die polish marks because die polish marks always go in the same direction. Normally I'd agree. And in this case the majority of the marks on the obv and rev do run the same direction. It is only the patch of marks at the left corner of the memorial that do not. And since those perpendicular marks are faintly visible on the O and the top set of steps, they are not die polish marks. And since they cannot be die scratches since there are so many of them and so evenly spaced, and since they cannot be flow wear because they are limited to one area only and so severe. The only conclusion I can draw is that for whatever reason somehow a piece of strip got rolled twice and in opposing directions. Doesn't seem logical I know. But when you have removed what it cannot be, whatever is left, it must be.
OK I didn't pay attention to the obverse because he said it was more visible on the reverse. I agree the marks on the obverse and those running down to the left on the reverse are roller marks. The stuff running down to the right through the left side of the Memorial and ON are not.
I've never given this any thought before, but do they use rollers in the transport mechanism on both sides? Chris
I think it's a planchet/plating issue. Although the crosshatched place is unusual the rest of the parallel lines are seen frequently on zincolns.
Well, I've taken some more photos, and anything on the obverse is quite normal, IMO. You have the normal "parallel lines" like you see on zincolns, as d.t.menace said, and is probably, as Doug said, roller marks. These are not 'raised' as we would normally call something raised. There are also some of the circular lathe lines when magnified a lot. On the reverse, again much is quite normal. After taking more pics and working with it, the lines that are going essentially from SW to NE on the reverse are also assumed by me to be roller marks, and very normal. Again, not raised. The diffused areas around the N and the NW corner of the Memorial are probably related to MD. The parallel lines that do the crosshatching are the only strange things on this coin, after further consideration. I cannot say definitely they are 'raised' or not, but they are not incuse from what I can tell. They are quite parallel and obviously to me are machine made somehow, as opposed to die polishing that might be done by hand with a tool. They also do not seem to be feeder finger marks to me, but I'm no expert. The way the design interrupts the parallel lines, it seems to me the damage was done prior to the die striking the coin. So, I think it's either some sort of plating issue that is manifesting in a way that somehow resonates with the other normal issues and is simply manifesting itself there on the coin because of the striking pressure for that particular die or something, or it is somehow an illusion when held a certain way. Because when held at a certain angle, the lines somewhat 'disappear' so that the only raised areas seem to be some lines of zinc gas bubbles. I don't know. Anyhow, here's the pics. Enjoy.
I think that the government is so broke that it is filing excess copper off of pennies the way it did back in the day with silver coinage. My 1796 and 1798 dollars have the exact same lines on them.:yes:
Die polishing is always done by a machine that polishes the whole die at the same time. And only the fields of a die are polished.
Roller marks aren't from a transport mechanism they are from the heavy rollers that roll out the ingots into strip and reduce it down in thickness to that of the blank, and that is done by passing it between sets of rollers above and below.
I would have to think this is a die problem and not a planchet problem. Maybe an unfinished die got loaded into the press before it received it's finishing polish... The lathe lines would certainly indicate that.... hard to say tho.
