Great Britain 25 new pence

[EgCollector]

This coin weights 28.2 g on my digital scale.

It is stated in Krause that there are two 1977 New pence, one is copper-nickel and the other is silver proof.

my coin doent seem proof to me but is it possible that copper-nickel coin has the same weight as that of silver?

Thanks

[triggersmob]

I haven't seen one of those before.
Looks real nice, thanks for showing it.

[EgCollector]

If someone knows the diameter of both coins, please post it as i think that would make it easier for me to compare.

[EgCollector]

I haven't seen one of those before.
Looks real nice, thanks for showing it.

well i really dont know if this is actually a coin or medal  because krause only shows one side of it, the first pic

and i dont see any denominations on the other side of mine, but there is no other Great Britain coin i have seen with this design so i estimated that this is a 25  new pence 

[Nighthawk]

Amr, the 25 New Pence copper-nickel version, KM# 920, was minted in both Uncirculated & Proof, and is 38.5 mm in diameter. The sterling silver version, KM# 920a, was made in Proof only, and weighs 28.2759 grams. There is no weight given for the C/N version. If your coin does not weigh in at 28.2759 grams on the scale, then it must be copper-nickel. I do not know if the C/N coin would weigh more or less than the silver version though. Can someone help with that?   

[EgCollector]

Thanks John,

It is 38.5 mm and 28.2 grams so this would make it what? 

Any help with that ? Do a copper-nickel and a silver coin of same size weight the same ? 

[Nevol]

It's a 'Silver Jubilee' Crown, (25 yrs as Queen) and was made in Cupro Nickel for circulation, Cupronickel Proof, and Silver Proof. 

Have a look here for values of all 3 types.  http://www.coins-of-the-uk.co.uk/values/deccr.html  The values given are in UK£

Actually try this a see if you can notice a difference:

Get a clad quarter place it next to crown. then place a white tissue over the two coins. the clad should appear gray if the crown is silver it should appear white. not very scientific but it works on most silver. (cribbed from the "other" site, author is nohope, so I'm sure he won't mind me posting it here)

Let us know if you've scored a proof silver 

[EgCollector]

Thanks   Nevol for the link, would a bicentanial S quarter be used in this test ??

[Nighthawk]

Thanks John,

It is 38.5 mm and 28.2 grams so this would make it what? 

Any help with that ? Do a copper-nickel and a silver coin of same size weight the same ? 

The weight of 28.2 grams is given for the SILVER issue KM# 920a. No weight is given for the copper-nickel version.   

[Nevol]

Thanks Novel Nevol  for the link, would a bicentennial S quarter be used in this test ??

Clad quarters started in 1965, so I think just about any quarter since then (apart from Silver Proofs) should work. 

I just tried a bicentennial quarter beside a 1965 Canadian 50¢ to see how they look through the tissue, and IT WORKED!  The quarter was gray, the  Canadian 50¢ was white. 

What a simple way to see if you've got a silver coin or not. 

I love it!  

It's not quite as reliable on coins with a lower silver content though, 50% Aussie coins appear to be somewhere between gray / white.