Australian-Coins Forum

Australian Coins, Banknotes and Exonumia => Australian Errors and Varieties => Topic started by: echidna on December 21, 2016, 07:46:41 PM

Title: Is this a die cap ?
Post by: echidna on December 21, 2016, 07:46:41 PM
(http://i1213.photobucket.com/albums/cc462/joseywales10/51%202_zpsyxmlbaej.jpg)

(http://i1213.photobucket.com/albums/cc462/joseywales10/51%206_zpscq4ezzzm.jpg)

Slight cup shape effect visible and reverse is wider than obverse.
Die cap ?
Opinions appreciated.
Title: RE: Is this a die cap ?
Post by: nealeffendi on December 21, 2016, 11:28:25 PM
The gouge under the kings chin is common in jammed coins that the mint staff had to force out of the press. So some sort of error coin.
Title: RE: Is this a die cap ?
Post by: fred lever on December 22, 2016, 12:46:55 PM
Hi, looks like a "cap coin" or "counter brockage" to me. It is still pretty sharp on the brockage side so may have only hit once or twice and then spat out possibly glued to the brockage hence the big screwdriver mark to prise them apart. They tend to get ignored or just written off as  damaged but are just as important as the other half, the brockage. Nice coin, now find the other half!!
Fred
Title: RE: Is this a die cap ?
Post by: echidna on December 22, 2016, 02:24:13 PM
Thanks Fred & Neal
Title: RE: Is this a die cap ?
Post by: markn on December 22, 2016, 06:09:41 PM
Can we see a picture of the rim please?
Title: RE: Is this a die cap ?
Post by: echidna on December 22, 2016, 07:27:40 PM
Quote from: 'markn' pid='103019' dateline='1482392381'Can we see a picture of the rim please?


(http://i1213.photobucket.com/albums/cc462/joseywales10/P1010011_zps7wndl5ar.jpg)

(http://i1213.photobucket.com/albums/cc462/joseywales10/P1010003_zpsjfcqlbnk.jpg)

(http://i1213.photobucket.com/albums/cc462/joseywales10/P1010012_zpsmugtipfy.jpg)
Title: RE: Is this a die cap ?
Post by: robbiegal on December 22, 2016, 09:42:22 PM
Quote from: 'fred lever' pid='103016' dateline='1482373015'Hi, looks like a "cap coin" or "counter brockage" to me. It is still pretty sharp on the brockage side so may have only hit once or twice and then spat out possibly glued to the brockage hence the big screwdriver mark to prise them apart. They tend to get ignored or just written off as  damaged but are just as important as the other half, the brockage. Nice coin, now find the other half!!
Fred

Hello Fred - Merry Christmas to you from Robbie  (AKA Robyn)
Title: RE: Is this a die cap ?
Post by: markn on December 23, 2016, 08:35:00 AM
How much does it weigh Echidna?
Title: RE: Is this a die cap ?
Post by: fred lever on December 23, 2016, 12:15:40 PM
Quote from: 'robbiegal' pid='103028' dateline='1482405142'
Quote from: 'fred lever' pid='103016' dateline='1482373015'Hi, looks like a "cap coin" or "counter brockage" to me. It is still pretty sharp on the brockage side so may have only hit once or twice and then spat out possibly glued to the brockage hence the big screwdriver mark to prise them apart. They tend to get ignored or just written off as  damaged but are just as important as the other half, the brockage. Nice coin, now find the other half!!
Fred

Hello Fred - Merry Christmas to you from Robbie  (AKA Robyn)

Hi Robbie! Merry Christmas to you and all as well.

For general info and my take on brockages I did a couple of articles for CAB, look for CAB March 2015 18-02 page 38 a general ramble on the subject and CAB October 2015 18-09 page 28 about a specific coin.
Fred.
Title: RE: Is this a die cap ?
Post by: echidna on December 23, 2016, 12:52:39 PM
Quote from: 'markn' pid='103033' dateline='1482444300'How much does it weigh Echidna?

No scales unfortunately.
Title: RE: Is this a die cap ?
Post by: markn on December 23, 2016, 06:54:44 PM
Quote from: 'echidna' pid='103038' dateline='1482459759'
Quote from: 'markn' pid='103033' dateline='1482444300'How much does it weigh Echidna?

No scales unfortunately.

OK.  It might be a die cap but honestly there's nothing that screams die cap to me.  It could also be be a centered partial collar, perhaps due to the planchet being unrimmed (type 1 planchet).  I'm tending toward the partial collar because there's a fair bit of folded over metal on the rim of the obverse which is probably "finning" that occurred as the planchet squeezed between the collar die and the anvil (obverse) die.  Because the coin has seen circulation the finning has all folded over.  The scrape on the obverse suggest it was stuck to the collar/anvil die and a press operator stuck a tool in there to dislodge the coin causing the scrape mark.

That being said it COULD be a die cap but the extremely rare ANVIL die cap, of which I've only ever seen two on Australian coins.  Because of the finning I'm fairly certain it's not a hammer die (reverse) die cap as the finning wouldn't happen as the cap would be banging against other coins precluding the formation of the finning.

Of course all this relies on the obverse die being the anvil die.  The Melbourne mint of the period seems to have used the obverse die as the anvil die for shillings but from what I can see from images I have, used the anvil die as the reverse for threepences.  Who knows what the London mint was doing.
Title: RE: Is this a die cap ?
Post by: echidna on December 23, 2016, 07:45:15 PM
Quote from: 'markn' pid='103042' dateline='1482481484'
Quote from: 'echidna' pid='103038' dateline='1482459759'
Quote from: 'markn' pid='103033' dateline='1482444300'How much does it weigh Echidna?

No scales unfortunately.

OK.  It might be a die cap but honestly there's nothing that screams die cap to me.  It could also be be a centered partial collar, perhaps due to the planchet being unrimmed (type 1 planchet).  I'm tending toward the partial collar because there's a fair bit of folded over metal on the rim of the obverse which is probably "finning" that occurred as the planchet squeezed between the collar die and the anvil (obverse) die.  Because the coin has seen circulation the finning has all folded over.  The scrape on the obverse suggest it was stuck to the collar/anvil die and a press operator stuck a tool in there to dislodge the coin causing the scrape mark.

That being said it COULD be a die cap but the extremely rare ANVIL die cap, of which I've only ever seen two on Australian coins.  Because of the finning I'm fairly certain it's not a hammer die (reverse) die cap as the finning wouldn't happen as the cap would be banging against other coins precluding the formation of the finning.

Of course all this relies on the obverse die being the anvil die.  The Melbourne mint of the period seems to have used the obverse die as the anvil die for shillings but from what I can see from images I have, used the anvil die as the reverse for threepences.  Who knows what the London mint was doing.

Thanks Mark