Today, I got the following info from Japan's friend.
about C.walkeriana alba Pendintive it was from USA (Jon & Scurry) long time ago it is not sure but also we thinking hybrid from C.loddigesii or Angel walker Part of lip very different between walkeriana when make Mini Purple(walkeriana x pumila ) if make it use true walkeriana become different Mini Purple we know them many time Tokyo No.1 I don't know I 'm thinking TokyoNo.1 is OK