Friday, October 14, 2011

161. 20 sen 1968 lamination error 20%

image 1: obverse and reverse of the coin
image 2: lamination of the coin
{amended entry}

        I would like to express my gratitude to my fellow bloggers friends, depankanta, whycollect and Dickson for correcting me. At first I thought that this is a strike through cloth error coin. But it seems my imagination dragged me too much.

       This is actually a lamination error coin. Lamination error is categorized under Planchet Error/Defect. A lamination error occurs when the surface of the coin looks like it is being peeled off. It is also caused by impurities in the metal used in the blanking process or by some debris that was in the stamping dies.

      About 20% of the area on reverse get affected by the lamination.

     A lamination error coin is a random error. No two lamination error coins are exactly same.

{original entry}

        At the first sight, I thought that this is a heavily stained coin. But upon close inspection, I suspect that this could be a strike through error coin, probably strike through a piece of cloth?

           Strike through error coin happens when foreign object came into the striking chamber, hence become struck into along the coins. Even remnants of the foreign object, or the whole object itself, sometime can be found stuck inside the coin.

         The weight of this coin is 5.59g, only 0.06g less than the supposed weight, 5.65g. Circulated coins are always having lower weight than the actual weight due to wear.


Anonymous said...

Could it be a lamination instead?
Haha, just a wild guess.
Thanks alot for sharing, mnfaj :)

Niewmismatic Error Coins said...

This is a Lamination Erros-Planchet Errors!
Happy Sunday.

depankanta said...

Salam mnfaj,
Mengikut pendapat depankanta penting utk dilihat pada sisi(edge)syiling ini samada terjejas atau tidak.Kalau benar ianya strike through kenapa masih jelas beberapa imej huruf"SIA",angka "968"dan"0",bila die menempa planchet yg berlapikkan cebisan kain.Semua imej akan ada kesan kain..Bentuk yg terjadi juga kelihatan lurus dan selari sukar terjadi jika ianya cebisan kain..apapun,jauhari juga yg kenal manikam,depankanta hanya nak test pendapat jer..hehe
Terima kasih banyak2 mnfaj,.banyak boleh dikongsi dari syiling ini....

mnfaj said...

Hi whycollect,
Yea, I agree with you. Thanks for correcting me. Learning is a life-long journey. And everyone is a sifu to each other! Cheers!

mnfaj said...

Hi Dickson,
Thank you so much! Keep reminding me :D

mnfaj said...

Salam depankanta,
Terima kasih banyak-banyak atas tunjuk ajar depankanta, nampaknya kali ini saya telah tersalah analisis. Mujurlah ada kamu bertiga memperbetulkan saya. Banyak banyak terima kasih! Teruskan membimbing saya!

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