QUOTE(jlueke @ Feb 19 2007, 10:21 PM) [snapback]304096[/snapback]
Is the lettering done last? Can some of the coins fall into the bins before they get lettered? I have some trouble visualizing how these errors could occur.
I visited the production area of the Mint in Philly a couple of weeks ago as part of a media tour. The various steps for making the Prexy dollars take place all scattered around the hall, since the equipment is all newly installed and placed in provisional locations until they get the process down pat. So they do one step over here, fill up a big wheeled bin, trundle it over there to the far side, pour them into another machine for the next step, and so on. The guy who led us around said that the dollar coins travel something like a mile within the Mint before they're done.
While these bins are being shunted around, I noticed many instances where bins of coins in different stages of production are sitting side by side. I wouldn't be that hard for some to get mixed up, if a passerby just grabbed a handful out of one and then tossed them back into the other bin.
I was amazed that there are always lots of coins that spill and fall on the floor, roll under the machinery, get left there, a real mess. Nobody cleans up until the end of the day. Every once in a while one of the coins jams in the machine and gets all chewed up, then they just pull 'em out and leave the mulched-up coin lying there.
In other words, besides the usual errors like off center strikes, double strikes, etc, expect to see the following types of errors that will be unique to the dollar coins, which in my opinion are highly likely to occur:
- missing edge lettering
- edge lettering only, on unstruck planchet
- planchet missing both strike and lettering
- struck on unburnished planchet (kind of brownish from the annealing process)
- struck on planchet that wasn't rolled to give it a raised rim before striking
- some combinations of the above
Since the Fed ordered 300 million Washingtons and the Mint has really rushed to get them ready, using a jerry-rigged production system that they're not real famiilar with, my hunch is they're not checking too carefully for errors as they go.
Start hunting!
-- Matthew