This thread brought back memories.
My Dad had a set of the nickel w/ivorex grips.
Someone had given them to him as a gift.
I don't know if he ever shot them.
Me and my brother did!
I don't remember being able to hit anything with them.
We weren't supposed to touch them, but my older brother got a night job and felt like he needed protection.
He put one of Dad's derringers in the glovebox of his car, and it was stolen.
Dad still had the other gun when he passed away. The velvet box was gone.
For some reason, one of my sisters had always liked those guns, so we gave the remaining one to her.
The finish held up well on his guns.
As I said, not very accurate, but fun to shoot.