Possible to have a 1975s proof set with Ike Dollar unfrosted portrait?

I bought this proof set today and it contained an Ike Dollar with no frosting on the Presidents portrait. The portrait looks like a mirror to me also. I don't know if this will help, but I weighed the proof set cases(with coins) and the 1975 mirrored Ike set weighed 129.6grams while the 1976 frosted weighed 126.9grams. I'm not sure about weight tolerances and would also like opinions on the frosted and the mirrored coin but mostly I am wondering about the mirrored coin. Thanks in advance! EDIT: The first coin in the pics is frosted and the second coin is mirrored and so on.

 

Log in or Sign up to hide this ad.

It is very possible. With the mechanics of adding cameo to a coin goes to the dies. In the 70s, Cameo will wear down as the dies strike more and more. So the dies probably went through a few polishes but not replacing the cameo (I believe they did sandblasting then) That would buff out the cameo appearance when the dies strike the next round of coins.

 

This one got NGC graded without any designation of cameo. It is completely lacking of it.

 

acid edging, thats how they get proof coins

 

Depends on what year you are talking about. They have used acid etching, sand blasting (with various grades of grit), and laser etching..

While frosting becomes much more common after 1973 it is possible through the late 70's to sometimes find non frosted coins.

 

Question. When they polish the face of the proof dies, are they done by hand or by automated machine?

 

I don't understand what the OP is asking?

What are you asking?

What are you alluding too?

 

His proof coin isn't cameo.

 

I just wanted to know if it was common for a coin in a proof set to not be frosted? I also wanted to know why the coin that isn't frosted shows more defined details of the portrait (the hair and eye areas)? About the weight, I guess it could be due to the plastic of the case but found it odd that both sets weighed different.

 

Its because after the die is made, they do a etching process (one of them that Condor101 mention) which removes some of the details, then they polish the face of the die to a mirror finish.

 

and proof coins are strike more then one time

 

Is it possible the coin without the frost is a 40% silver coin?

 

Are you sure that is a 1975 proof set? It doesn't look like a type I dollar and I thought all the proof Ikes in the 75 sets were type I

 

Here are a couple of pics of my 1975 and 1976 proof sets.

EDIT: If more pics are needed, let me know which areas of the coin you need to see.

 

Take a picture of the "edge" of the coin in question.

 

LOL

 

First image is the edge of the coin in question. Second pic shows the edge of a 1976s Type 2.

 

Thanks for the photo. See the copper edge on the coin in question? That tells me without a doubt that it is not a 40% Silver coin as the core on the 40% Silver coins is comprised of 80% copper and 20% silver which produces a "gray" colored core.

 

No problem Lyds. I took a couple of more pictures closer to the edge because I think what you are seeing might be a reflection of the red. I put an arrow pointing to the reeded edge which I think does not have copper. I see there is a difference in colors between what you and I are talking about. I think I just need to try and catch it at the right angle. Is there any other way to determine if it is silver??? I'm not trying to start a war so please don't take this the wrong way. Do you think edge the arrow is pointing to is red or gray or undeterminable?

 

Lyds I agree with you, I do see the copper. But, do you know why there is a weight differential of 2.9grams between the two?