Two irregular stones - Dalmore Blue?

Two stones that are at my house as long as I am able to reach my memory. Dad always sharpened on them kitchen knives and I sat next to it and watched this "ritual" :) First he spit on a stone and later with pietyzm dragged a knife on a stone, checking every now and then sharpness with the tip of the finger ...
The stone soaked in water smells of river silt and very quickly produces a suspension. It reminds me of the Dalmore Blue stone, but I'm not sure ...

Attachment 298508

Attachment 298509

Attachment 298510

Where do these fall in a progression and how do they perform? What size are they?

I haven’t really seen any dalmores with such an irregular cut before, but that doesn’t mean they’re not around. Looks wise they fit- I have a few dalmore blues that might aswell be identical to your stones, so that would be my guess based on looks alone. They are sometimes bluey, sometimes have a distinct green tinge to them, which I think I see in the one on the right unless its the lighting?

Earlier photos are taken in natural lighting so I hope that the color of the stones is close to the real one.
These two stones came to my house brought by my dad together with the stones of Water of Ayr and they were in everyday use while the latter were in the basement for years...

Attachment 298584

Yes Dalmore Blue for sure

If they came with some water of ayr stones then they probably are dalmores. Your dad clearly liked scottish hones! Any idea where he got them?

They are great used with slurry after a 1k stone to refine an edge quickly. If they perform in that capacity then again that probably makes them being dalmores all more likely. I can post some photos of mine if it would be at all helpful.

Have you used them/ the water of ayr stones?

Stones were used in the rotary printing process to sharpen the knives that collected the paint...

I will be happy to see your photos

I used the Water of Ayr stone to finish the blades with a chisel and engraving tools. They made an excellent blade...

Attachment 298588