Well without seeing the obverse I can't say much about the date. But it is definitely form the Denver mint. That is an RPM - repunched mint mark. But based on the pics the coin appears to have been cleaned and perhaps whizzed. Do you have pics of both sides showing the full coin ?
1959d Rpm Complete image of coin What do you mean whizzed? But I will try to get a full picture of both sides tomorrow.
With a few exceptions, mintmarks were always on the reverse prior to 1965. Starting in 1968, all mintmarks were moved to the obverse. During 1965-1967, there were no mint marks, even though coins were struck at all three mints during those years.
I said that the coin appeared as if it may have been cleaned or perhaps whizzed because of the fine scratches in one of the pics. If you look closely there is an entire series of fine lines all about equidistant form each other and all running in the same direction across the surface of the coin. It would be quite unusual for such a wear pattern to occur naturally. But it is not uncommon to see such a coin whizzed. As I said in another post recently - when a coin is whizzed the surface of the coin is gone over with a rotary wire brush. This creates the uniform fine scratches and lines across the surface of the coin. Sometimes this is done to remove dirt and debris from the surface of the coin. And other times it is done to create the false impression that the coin is in better condition than it actually is. For to the untrained eye a whizzed coin can appear to have luster and thus be worth more. And with a coin with that is a key date or a variety - such as an RPM - it can help an unscrupulous seller pawn off the worthless coin ( because of the whizzing ) on a collector that doesn't know any better. Look closely again now. See in the protected areas around the mint mark itself and the initials on the obverse how the coin is quite dark. But yet the rest of the surface of the coin ( the open areas ) is completely free from dirt or any dark color ? Well that tells me the coin has been cleaned. And the fine, uniform scratches tell me it may have been whizzed. If I had the coin in hand - I could tell for sure.
So basically your saying this coin is worthless if it has been whizzed, even with such a prominent RPM? Might as well recirculate it then. Too bad..
Just because the coin has been whizzed, and it certainly looks like it, doesn't make it worthless. It can still be used to teach others about numimatics, RPM's, whizzing, art, history, and many other things. Never give up on a coin.