Vintage black hard Arkansas oilstone

The stone is very dark grey / black in colour, very hard snd consistent, and comes in the original box with paper wrapping in excellent condition.

Stone measures 201 x 49 x 20mm, Stone shows partial translucence and has some natural fissures on the back of the stone

I have taken a photo against a grey Norton translucent Arkansas for colour reference only

Any questions feel free to ask