Glad to be back after the break! I got my first coticule from the invisible edge and i have recently started to get the most out of the hone as it gives good sharpness from slurry. Any information on the hone will be much appreciated .
Many thanks michael
I'm not sure. It could be La Dressante, or otherwise La Grosse Blanche. If you really want to know, place it in direct sunlight, with a coin on the surface. After a day, compare the spot were the coin blocked the sunlight with the rest of the surface. If the surface darkened, it's a La Grosse Blanche. If not, it's a La Dressante. Your assessment that the stone offers high keenness on slurry points in the direction of the latter.