Machine doubling on proofs in a set - Common? Collectible?

[rmsexauer]

Is it more unusual to find machine doubling on coins in a proof set? I thought the mint took extra special steps to make sure proofs didn't have these types of errors..are they collectible in proof coins?

[Treashunt]

In response, in order:

 

1) Unusual?probably

2) They do.

 

Then Collectible? Not to me.

 

 

[JStull]

There could be several reasons why the MD occurred on a proof when struck.

 

They're the same reasons MD occurs on business strikes during striking.

[RWB]

Modern proofs - after 1964 - are struck twice using a special press. One would reasonably expect to see some slightly doubled impressions.

[rmsexauer]

2007 Silver Proof Quarter Set Doubling

 

 

Should this amount be appropriate for a proof set?? It appears on two coins in this set..

[cpm9ball]

The mere fact that it is a proof doesn't guarantee that there can't be flaws or errors overlooked by the Mint employees handling the coins. For all we know, someone may have had a bad hangover from the night before.

 

Chris

[19Lyds]

Machine Doubling on Eisenhower Proofs is quite common. I'd expect the same for other proof coins.

[alacratstore-migration]

The proof shown above certainly doesn’t give a vivid flaw in the coin, perhaps it seems some other thing for sure.

[James_OldeTowne]

Is it more unusual to find machine doubling on coins in a proof set? I thought the mint took extra special steps to make sure proofs didn't have these types of errors..are they collectible in proof coins?

I know that many collectors prefer NOT to have machine doubling on their proofs, so my guess would be that coins showing this may need to be considered "discount" examples.

[messydesk]

I would prefer my modern proofs to not have machine doubling, but that preference is way down the list from things like spots, hairlines, haze, and fingerprints.

[mkman123]

I was expecting really obvious doubling in the link above. I think errors on proofs are pretty neat

[alacratstore-migration]

The proof shown above certainly doesn’t give a vivid flaw in the coin, perhaps it seems some other thing for sure.