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I've seen this specimen in a local store for about 150€. Seems like a La Dressante but I don't know for sure. Size is 20cmx5cm (8"x2") 13mm thick combo in selected grade. It is a good deal? Sorry, this is the only photo I have:
I have a big stone like that (LPB) that I paid quite a bit more for. It does get heavy in my hands after a long honing session. Last weekend, I had a couple guys over and honed a few razors for them, and I rehoned a couple of mine prior to that. By the end of the evening, my stone holding hand was worn out... So was my honing hand.