Major error eye candy #13: John Wilkes Booth, that's who

jonathanb · March 27, 2014 9:00AM

Sometimes a bit of slag will be rolled into the coinage strip. If that slag later breaks apart and falls out, the results can be dramatic. A 'blowhole' error forms when a bit of slag falls out of the middle of a planchet, leaving an intact rim with a hole in the middle. This example has an incomplete rim, so it isn't quite a blowhole. Call it a defective planchet, or a very very very ragged clip. Whatever the case, it'd be hard to top the positioning of the hole!

ctf_error_coins · March 27, 2014 9:02AM

That's a nice one, quite large.

It would have been cooler if it was a blowhole.

goodmoney4badmoney · March 27, 2014 9:48AM

It's close enough to a blowhole. Semantics...
also, it's a nice coin!

astrorat · March 27, 2014 11:41AM

Here's one ...

errormaven · March 27, 2014 11:45AM

Neither of the "blowholes" featured in this thread are the result of slag falling out of the planchet/coin. The beveled edges of the holes indicate that these gaps opened up in the coin metal strip during rolling as the result of tensile stresses.

Baley · March 27, 2014 11:49AM

wow, and on the first year of the Kennedy half, too.

An awesome companion piece would be a similar half dollar (2009 would be ideal!)

neat neat coin, very curious at the approximate value of this kind of error.

ricko · March 27, 2014 8:37PM

Interesting.... have not encountered a coin with that anomaly as yet.... Cheers, RickO

SaorAlba · March 27, 2014 9:57PM

That has cool factor all over it.

johnny9434 · March 28, 2014 1:10AM

<< That has cool factor all over it. >>

no kidding. thats awesome.

steveben · March 28, 2014 2:40AM

cool coin!

jonathanb · March 29, 2014 1:33AM

<< Neither of the "blowholes" featured in this thread are the result of slag falling out of the planchet/coin. The beveled edges of the holes indicate that these gaps opened up in the coin metal strip during rolling as the result of tensile stresses. >>

FWIW, I disagree with that in respect to mine. The hole over Lincoln's head is fairly round, and the interior edges are jagged. The jaggedness also is present above and to the left of IN GOD. The only beveling I see is on the "tongue" of medal where WE would have been, which is much thinner than the rest of the coin and received a very weak impression as a result.

errormaven · March 29, 2014 2:35AM

Your photos show beveling around most of the internal margin of the deficit. This is typical of "blowholes" produced by tensile forces. You see similar beveling in the facing edges of many "jagged fissures" that extend into the interior the coin from the edge. In these errors, there is no place for slag to have resided.

Holes due to missing slag do occur, but they are very rare, and the internal margin shows no beveling. Instead they show a sharp, "flinty", irregular topography.

astrorat · March 29, 2014 2:49AM

<< Your photos show beveling around most of the internal margin of the deficit. This is typical of "blowholes" produced by tensile forces. You see similar beveling in the facing edges of many "jagged fissures" that extend into the interior the coin from the edge. In these errors, there is no place for slag to have resided.

Holes due to missing slag do occur, but they are very rare, and the internal margin shows no beveling. Instead they show a sharp, "flinty", irregular topography. >>

Call mine whatever you like ... I just like it.

Mine was purchased as a "blow hole" error and I am sure the name was just a reference to the "hole" being internal and not openly connected to the edge (which I generally see referred to as a defective planchet?. One explanation I had heard was as the coin was struck there was an internal "bubble" that burst.

Mike ... what do you think occurs to cause these types of defects?

Edited for grammar ...

errormaven · March 29, 2014 4:58AM

<< 

<< Your photos show beveling around most of the internal margin of the deficit. This is typical of "blowholes" produced by tensile forces. You see similar beveling in the facing edges of many "jagged fissures" that extend into the interior the coin from the edge. In these errors, there is no place for slag to have resided.

Holes due to missing slag do occur, but they are very rare, and the internal margin shows no beveling. Instead they show a sharp, "flinty", irregular topography. >>

Call mine whatever you like ... I just like it.

Mine was purchased as a "blow hole" error and I am sure the name was just a reference to the "hole" being internal and not openly connected to the edge (which I generally see referred to as a defective planchet?. One explanation I had heard was as the coin was struck there was an internal "bubble" that burst.

Mike ... what do you think occurs to cause these types of defects?

Edited for grammar ... >>

Yours is a typical example. The beveled edges are consistent with tensile forces tearing open a hole in the coin metal strip during rolling.

MsMorrisine · March 29, 2014 5:39AM

bevels are shear

errormaven · March 29, 2014 5:53AM

Not in this case.

BLUEJAYWAY · March 30, 2014 1:32PM

The 64 looks like a "bullet" hole. Appropo considering how our President was assasinated.

Major error eye candy #13: John Wilkes Booth, that's who

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