I got this coin while browsing ha.com . How do they know if this blank is 90% ? The edge ? Just the fact it came from the San Francisco Mint and how do blanks make their way into circulation ? Just a bit confused, after all it's 2:10 a.m . https://coins.ha.com/itm/errors/no-...pe-one-blank-planchet-au58-pcgs/a/1219-8989.s
Well, weight, and I guess specific gravity tests or something arcane like that. Maybe you're right that the edge has something to do with it. Number of reeds (if those are even present)? Dunno. (Edit- yeah, a 90% silver planchet would be pretty immediately apparent from looking at the edge, as opposed to a 40% silver clad one.) My question is, how the heck do you grade a blank planchet? As to how they determined it's a blank for an Ike, that's another good question. Dunno. Interesting.
Dang, somebody paid $660 for that blank slug, back on April 15th. Says so on the cert page. And $705, in the linked auction, on April 26th. Seems a little nuts to me, but I'm not an error/variety specialist.
Many planchets are struck and 1 or 2 are not so they all end up in a mint bag for distribution. When the customer opens the bag the find the blank.. Is one way.
Here are 2 Blank Ike Dollars from my collection.. I will sell you the pair for $600.00 (To the mods.. I'm just kidding about selling)
It IS graded. Look again! PCGS AU58. Says it right there. Second line of text on the label. Right above that attribution.
Genuine silver and Ike Dollar errors are rare. The reason is that these coins are so larger that it is hard for them to slip by the inspection process. Conversely, cent errors, which are smaller, have much higher mintages and have low face values, are quite common. Gold coin errors are also rare because of the value involved.
The OP's coin is a planchet for a Morgan or Peace Dollar. It was weighed - sometimes the tags have the weight (412 grains official)
Because those have different weights, and a completely different look to them - They are easily differentiated between the two types.