Just picked up this Danitrio Cosmos (Choo) by Kenji Yamamoto. Marugane chirashi, raden, hirame-ji, and kingi maki-e. The section is stamped Grand Trio, which is the name the Hyotan model used to go by I believe. Amazing pen, super hard to photograph. I've been wanting an example of this artists work for some time. Good writer and gorgeous. This is an older model but I picked it up new and the LE number is 1/50.