Pilot has a number of pens under the Custom Heritage name and their number naming convention can be a little confusing sometimes. The Pilot Custom Heritage 91, 92 & 912 are a member of the classic Pilot Custom range of fine writing instruments. Pilot Custom Heritage 91 The Custom Heritage 91 pen was released by Pilot in different colorways that match the color of some of Pilot's Iroshizuku inks: Tsuki-Yo (blueish), Yama-Guri (brownish), and Yama-Budo (reddish pink). It doe