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Blast from the past courtesy of my friend google .......... http://straightrazorpalace.com/hones/38529-info-henckels-hones-whatcha-think.html

IIRC there was some talk about these a few years ago, and the buzz was that they were Naniwa superstones with the Henckles brand. Not sure if I'm remembering correctly, but someone may be along who...