Current auction up on the bay..

the ad reads 2 tone esher. Is it just me, or does that look more like a coti? Did Esher do any stones besides thuries?

Vintage "ESCHER" Razor Sharpening Hone/WATER Stone,7.6" - eBay (item 250692460723 end time Sep-11-10 18:32:22 PDT)