I have a couple old/vintage Whitman dime albums full of Mercury and (silver) Roosevelt dimes, with most coins showing similar toning. These dimes have been in these albums since I acquired them long, long ago. I believe the Whitmans have contributed to the toning--other factors in-play would include humidity and heat.
Is the Whitman a folder or an album ? A folder will be more likely the culprit than an album . But the environment where the book was stored could have been the main problem .
I have coins in Whitman folders that have been there for over 30 years and they look like when I put them in. Storage conditions affect coins more than what they are stored in.
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