Originally Posted by
Scipio
i believe it is a pierre de sud-ouest. I thought they were French. I have two of them at home, and possibly a third, unconfirmed as of yet. I find them to be less fine than a coticule and slightly softer. Some folks in posts have said IIRC they are as low as 4k equivalent, but others IIRC being higher. I would say higher but not as fine as a coticule. I would google them and more info will come up.
Until I knew what a pierre de sud-ouest was, I had thought mine to be a lesser type of Thuringian, or a schwedenstein, the latter which is a mottled German hone.