Here is a wheat penny in an old clear green holder for a 1956 mint set and both pennies are nicely toned. I consider that being in a hold for probably 25-30 years may cause toning.
Both of them look just fine to me. The toning is attractive, but its not anything spectacular. If they are relatively low grade, then there won't be much of a premium for them. The spot also really hurts the second one.
And a nickel is actually a 5 cent coin. Honestly, I never understood why people got their knickers in a bunch over this one. Calling a "cent" a "penny" is a colloquialism that has been around for centuries. What is so wrong with it?
Easy enough to take out the screws, handle with gloves and see if there is anything really special in there, maybe an error. If it has not been opened since put together, you just never know what you may find.
I love the pure beautiful color on these cent and love to know it is natural. the toning is IMHO this is my favorite kind of toning on a cent and is even more nice in hand.
My experience with these holders is that it was likely made prior to the late 1970s. The clear green holders were discontinued, along with the clear red and clear purple holders, prior to the solid blue holders disappearing.
The toning is market acceptable but I'm not sure what type of premium a low grade common Lincoln wheat cent with attractive (but not monster) toning would bring. I tried to sell some coins like this a few years ago and basically nobody bid on them.
