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Known in Japan as the “jewel of leather”, shell cordovan is the most precious and luxurious leather of all. It is cut from a thin, dense layer found only in a horse’s rump, so each hide yields very little. After months of tanning and hand polishing, it takes on a deep, glass-like shine and is several times denser than cowhide. Murase Kabanko uses it on the flap of its highest-grade Takumi Cordovan randoseru.