Victoria 1840 rupee with crack

[Md. Shariful Islam]

Have a look at the face of the Victoria 1840 one rupee... I see a crack on it... Do you??? This crack does not reach to the back...

[Figleaf]

Yes, that seems like a die crack. I can't judge from the picture, but there should be extra metal on top of the coin (en relief), forming the irregular line. If the line is in the metal (incuse), it is not a die crack. This is what happens if you work a die too long.

The crack is unusual in two respects. First, it is relatively wide, meaning that it took some time before the crack was noticed. Second, it has an irregular shape. Most de cracks run from the edge to the lettering of the legend, which stops the crack momentarily from developing further. In this case, there was no lettering, so the crack developed in a random shape until it met the head.

Peter

[Md. Shariful Islam]

Very difficult to se the type of the crack in bare eyes... Please suggest me a magnifier that may help... Another interesting thing is that, the crack starts from one edge and reaches to another edge... It seems to me so...

[Figleaf]

OK, I see what you mean. There are traces at the neck also. I can't see if they reach the edge of the coin, whether they connect to the traces at the forehead and if they are both en relief. I suspect they are two different cracks, as otherwise, the die would soon have broken in two and the coin would not have escaped quality control. However, in the final analysis, everything is possible. The general direction of the crack seems to be the same. Possibly a flaw in the metal used for the die?

Peter

[Md. Shariful Islam]

Peter

The crack doesn't reach the edge exactly... But I see a thin line even through the face... Difficult to see in bare eyes... Could u please suggest me a magnifier that might be helpful??? And I have also aploaded the the other side of the coin with star in relevant thread...

Islam

[Figleaf]

My preferred way to enlarge a coin is to scan it in the highest resolution (often 1200 dpi) and display it on your computer screen at 200% or as large as it will go without becoming unsharp.

Peter

[Md. Shariful Islam]

I am waiting for a more powerful magnifier... I want to see it clearly... I have become crazy... Probably I shall find something interesting into it...

[Md. Shariful Islam]

It's interesting... It's crack on the coin... Not for die error... It's for a fault of the planchet used for the coin... The crack is pretty thin and long... It is so long that it starts from one end and reaches to other end (very close to the edges)... Near the neck of the queen the crack has sub cracks... I am not an expert but I guess, the crack was because of fast cooling of the coin or something else... Experts comments please... I am gonna upload more pics soon for expert analysis...

Islam

[Figleaf]

The way you describe it, cooling would be a possibility, but cooling alone would not cause a die flaw. You need either impurities in the metal or insufficiently mixed metals. Different metals will shrink at different speeds, causing the flaw.

Peter

[Md. Shariful Islam]

Peter
Got scientific explanation from your comment... Got some clue... Thank u very much...

Islam

[Md. Shariful Islam]

Here is more pics...

[UK Decimal +]

Could there be a lamination of the copper, possibly two pieces beaten together before the planchet was produced?

Looking under strong magnification at the edge of the coin, is there any sign of this at any point around the circumference?   

Bill.

[Md. Shariful Islam]

Dear Bill
I am waiting for a stronger magnifier... Shall let u know if I find one...

Islam

[Coinsforever]

I too find some mark at 10 o clock  , inclined line  (    \  )   between India & one at reverse

refer picture of coin posted here




Any comments.


Cheers

[Md. Shariful Islam]

I too find some mark at 10 o clock  , inclined line  (    \  )   between India & one at reverse

refer picture of coin posted here





Any comments.


Cheers

I guess yours is the result of die crack as the line is incused on the flan.