Proof coins... How can you tell?

Sand-duner · Aug 31, 2011

I'm still learning the ropes on coin terminology, recognition, etc. What exactly is a "proof" coin/set? Looking at the values of coins on different sites, they always list "proof" coins and the value of those is much higher than even a AU grade "regular" coin. Just wondering what makes them so special, and how can you tell if it is a proof coin?

worldtalker · Aug 31, 2011

Bag marks,meaning in a coin sack.Never been circulated lots of luster.

Sand-duner · Aug 31, 2011

Ah, thank you!

mrs.oroblanco · Aug 31, 2011

Often also has, what is called "frost". The raised portions have a "frosty" look.

Like this:

Note here, a lot of proof nickels don't seem to have as much of the frost.

Beth

SeaninNH · Aug 31, 2011

there are different types of proofs...

Here are a few. The 1987 was not a proof although it was from a mint set.

gleaner1 · Aug 31, 2011

I know some modern proof coins only bear the 'S' mintmark. West Point is currently a proof mint I believe. Flawless stunning mirror fields and matte (frosty) devices are the key signature of proof coinage, eliminating any confusion whatsoever.

TerryC · Sep 1, 2011

Isn't a proof coin still sold in plastic...and the proof number on the plastic (sealed). If someone claimed a coin was proof, I would not buy it unless still in plastic. TTC

Nuggetville · Sep 1, 2011

A "red book" will go a long way here. Most modern coins have S mint marks. Although the bullion coins are minted in West Point. Terry is right, proof coins usually are packaged from the mint in plastic. Although there are many, if not more that have been pulled from the plastic in order to fill sets, and sell individually. Older coins are "raw" and you need to know your stuff. We used to own a coin store so if you all have any question, let us know! We also still carry a full library of books for identifying coin types and varieties. Take care and happy hunting!