1960 Lincoln D/D RPM?

Nice find.

1960D-1MM-001 At one time they were rare, but more and more of these keep turning up.

John1...Is that the best way to clean a coin...?

I use a different process. I use a mineral oil soak and a technique I figured out some time ago. This does not clean the coin, it just helps loosen the gunk around the devices. But you have to experiment on normal coins to get it down first.

Thanks everyone. I am excited about my first find.

coop, thanks for identifying the variety number for me.

sudz, I didn't know about coppercoins.com but now have it bookmarked. Thanks

I refer to it as bathing. It doesn't remove any surface like cleaning can do. It does not remove toning. But it will not remove green stuff and only to be used on circulated coins. No BU or proof coins! This is just for circulated coins.

Practice first on regular coins before attempting a premium coin.

what I do for coins with stubborn stains or debris in the devices is put the coin in a bowl of hot tap water until the water is cooled.
I use an upside down stainer to cover the drain hole in the sink. I place the soaked coin in the sink, and turn the hot water on very slowly at first, and increase the pressure so the coin becomes conpletely covered by the running water.

Run the water over the coin for about a minute or two. shut the water off and pick up the coin. Take some really fine cloth at least as fine as Microfiber and using a lot of pressure between your index finger and thumb rub the coin, and slightly rotate it as your rubbing it. I get about 50-75% of the foriegn material off most coins that way. I don't use acetone, but if there is a coin that is just plain NASTY, and may be a throw away, I'll use the Clorox Wipes on them. It removes alot off the coin, and dries EXTREMELY fast. Again, I use the Clorox Wipes only on coins as a last resort. If that doesn't do the coin any justice, then it's headed back to the bank or Coinstar.