Author Topic: Sultans of Dehli, D0156, Ghiyath al-Din Balban, Khitta Alwar, AR Tanka  (Read 1915 times)

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Ansari

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Sultans of Dehli, D0156, Ghiyath al-Din Balban

Khitta Alwar Mint
Silver Tanka
10.87 grams
« Last Edit: October 30, 2013, 05:04:42 PM by capnbirdseye »

Offline THCoins

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Re: Sultans of Dehli, D0156, Ghiyath al-Din Balban, Khitta Alwar, AR Tanka
« Reply #1 on: October 30, 2013, 02:24:50 PM »
Beautifull coin with sharp contrasts. Congratulations !
Do you have any idea what  could have caused the horizontal "stripiness" between the
characters on the left side ?  Seems like this was produced during striking, not afterwards.

Offline PeaceBD

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Re: Sultans of Dehli, D0156, Ghiyath al-Din Balban, Khitta Alwar, AR Tanka
« Reply #2 on: October 30, 2013, 03:33:20 PM »
Tariq, this is a nice looking coin and a proud addition to any collection. Is the mint name present between 9 to 12 o'clock on the left image? Would be nice if you could do your transliteration magic on this one.



Do you have any idea what  could have caused the horizontal "stripiness" between the
characters on the left side ?  Seems like this was produced during striking, not afterwards.


THCoins, those are stress lines caused on the coin during striking.

Offline Figleaf

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Re: Sultans of Dehli, D0156, Ghiyath al-Din Balban, Khitta Alwar, AR Tanka
« Reply #3 on: October 30, 2013, 05:13:00 PM »
I think the lines are stress marks. They are caused by overusing a non-hardened die.

As the coin is struck, the metal on the surface of the die liquifies for a split second and flows to form the design. The direction of the flow depends on the design, but an uneven die surface and contamination, weakening part of the die can play a role also. More important, the flows are the same with every strike. If the die is unhardened and used too long, the flows will eventually dig canals in the die, much like rivers in a landscape. These canals will show up on the coins as raised lines.

Peter
An unidentified coin is a piece of metal. An identified coin is a piece of history.

Offline THCoins

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Re: Sultans of Dehli, D0156, Ghiyath al-Din Balban, Khitta Alwar, AR Tanka
« Reply #4 on: October 30, 2013, 05:40:30 PM »
Stressmarks could be the answer for the lines. Thanks for the answer !
Only thing i do not fully comprehend; why would stressmarks continue in a straight line across some characters of the inscription? Because the characters engraved produce a discontinuity in the surface in which any surface stress would be releaved.

Ansari

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Re: Sultans of Dehli, D0156, Ghiyath al-Din Balban, Khitta Alwar, AR Tanka
« Reply #5 on: October 30, 2013, 05:53:06 PM »
Tariq, this is a nice looking coin and a proud addition to any collection. Is the mint name present between 9 to 12 o'clock on the left image? Would be nice if you could do your transliteration magic on this one.

Thank you, Mint name & Date is found on the circular margin and reading the same is very difficult. Both obv & rev contains the same thing. Over this coin Date is off the flan while only part of mint name is visible ( On Left image: 6 to 8' clock, Right image: 7 to 9' clock) from which mint has to be inferred. Frank on zeno helped me with the mint name.



Offline capnbirdseye

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Re: Sultans of Dehli, D0156, Ghiyath al-Din Balban, Khitta Alwar, AR Tanka
« Reply #6 on: October 30, 2013, 05:56:04 PM »
Perhaps the marks were in the sheet of silver to start with?  sheet silver has to be beaten & rolled to an even thickness before the blanks are chopped out, I have a coin somewhere with a good example of this
Vic

Ansari

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Re: Sultans of Dehli, D0156, Ghiyath al-Din Balban, Khitta Alwar, AR Tanka
« Reply #7 on: October 30, 2013, 06:03:27 PM »
Yes can be commonly observed over Dehli Sultanat Tanka's.

Offline Md. Shariful Islam

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Re: Sultans of Dehli, D0156, Ghiyath al-Din Balban, Khitta Alwar, AR Tanka
« Reply #8 on: October 30, 2013, 08:41:26 PM »
Beautifull coin with sharp contrasts. Congratulations !
Do you have any idea what  could have caused the horizontal "stripiness" between the
characters on the left side ?  Seems like this was produced during striking, not afterwards.

Oh dear! These are security marks of medieval silver coins :D. To me they add beauty.
Nice coin Tariq Bhai.

Offline Figleaf

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Re: Sultans of Dehli, D0156, Ghiyath al-Din Balban, Khitta Alwar, AR Tanka
« Reply #9 on: October 30, 2013, 08:57:28 PM »
Only thing i do not fully comprehend; why would stressmarks continue in a straight line across some characters of the inscription? Because the characters engraved produce a discontinuity in the surface in which any surface stress would be releaved.

It looks that way because that's what your brains want your eyes to see. In reality, there are only a few lines that are continuous and most, if not all of these are die cracks (also caused by over-use of the die), rather than stress marks. The die cracks on this coin (e.g. at 3 and 4 o'clock, 7 o'clock and slightly left and below dead centre) are more pronounced than the stress marks, which is the usual case.

Peter
An unidentified coin is a piece of metal. An identified coin is a piece of history.

akona20

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Re: Sultans of Dehli, D0156, Ghiyath al-Din Balban, Khitta Alwar, AR Tanka
« Reply #10 on: October 30, 2013, 09:09:09 PM »
The silver may have been cast as a rod before cutting and striking. Looking at this beautiful coin (one of the best I have ever seen) there is also the possibility that this coin was struck while the flan was hot. This is not an unknown practice and produces sharper images on the coin if the process is well controlled.

Offline THCoins

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Re: Sultans of Dehli, D0156, Ghiyath al-Din Balban, Khitta Alwar, AR Tanka
« Reply #11 on: October 30, 2013, 09:21:17 PM »
Thanks for the answers given so far on the stripes ! Let it not deter us from appreciating the beauty of the coin as is !