One Of My Favorite Proofs Since Its Hulk Green In The Right Light

Do you think it verdigre or some other sort of inviorimental cause?

Hey jfee, I bought a few Proof sets awhile back and opened up a 1961 set that had the quarter and nickel loose within its sealed bag holder. The plastic with in the bag holder that separates the individual coins had somehow got compromised over the years. The toning is only seen through light refraction and has a MS red shine when looked at from above in other lighting environments. Which makes me think its through a natural process and not chemically induced. The nickel had a nice subtle light blue toning as well, and its not the first time I've seen toning on coins from the chemicals used in the old vanilla envelopes
packaging, but it is a little rare for it to be so evenly and heavily toned in my opinion regarding proof sets. Luckily the coins hadn't got scratched by each other because an older gentleman had collected the set and never moved it around when in his possession.

Cheers

...I've got to admit... It's a nice looking proof !! You just never know what copper is going to do when exposed to the environment. Wow !!

LOVE IT!

Wow, nice green hue, fantastic eye appeal.

@BadThad.... Yours is a nice looker too!

Very nice!