I see a damaged/corroded area there. How about a photo of the complete reverse showing? It's not a cud, a die crack, or any error - look at the surfaces of your coin. They've been damaged/altered and you're seeing a stain or corrosion spot, nothing more.
Excuse me for being OCD, but... It can't be an "extra blob" of metal. Where would the extra metal come from? The planchet is made of a fixed amount of metal, no more. What happens is that a break in the die, itself, allows coin metal that was intended to flow into one space to flow into another space created by the break. A cud is a break along the rim that extends into the field. Chris
This is next for your coin. I see at least one plating bubble that that has popped and that means the dreaded zinc rot has begun. The D mint mark has fallen in the zinc hole of this cent. It’s hard to tell on yours how bad the rot is. Those darn Zincolns! I collect Lincoln cents but I stopped collecting any cent past 1982 for this reason. I put the bellow pictured coin away in a 2x2 back in the early nineties as a gem BU example to my surprise 15 years later this is what I got for my efforts to conserve Zincolns. I don’t even look at my other Zincolns I’ve carefully “conserved” no more zinc for me. Reed.
Yes indeed. I can’t wait for the discontinuation of the 1cent, 5cent and 10cent coins. It will happen but how soon is the question. I want the Zincoln gone and all I collect is Lincoln cents. Reed
plating bubbles. Any time you see weird or odd things on a zincoln (post 1982) it's probably a plating / corrosion problem. Plus don't forget, if you pulled this out of circulation you don't know what it's been through. After all, it's being used as money, not as a "collectable". Think of how many places you see piles of coins .. wife's purse, cup holder with soda pop spills, under the car seat/floor mat with salt corrosion, on the ground/parking lot .. the list goes on forever .... Also the zinc reacts to steam, such as the type that is found through your washer/dryer combo ... so think about that ...
Yes, I read that and I guess that doesn't apply here. Maybe just ......I don't know, a defect of some sort. How about a die defect?
Yes, good point. That complete area could have been corroded chemically. OK, to the spending pile she goes......
I usually go by the USA Coins 2020 (or whatever year), Guide Book and it's def. of a cud is; "An area of raised metal at the rim of the coin where a portion of the die broke off, leaving a void in the design." ".... at the rim....", being the key here. Or at least that's what I understand.