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Those ate pics of the stone in the OP
Here's a pic of one of the other stones

http://i5.photobucket.com/albums/y177/kupik/df4b396e.jpg

And the third one is a pfister hone

I was at my buddy's last night an he gave me a box full of old straight razors and I was going throughout a box and found a bunch of sharpening stones and found this and he said I could have it along...

I got this stone from my buddy last night it makes my 2k stone feel like 200 I lapped it today thus thing feels like glass I'm guessing it's something like a 4k/6k or 4k/8k stone the darker side is a...