There are no official codes issued by Pilot for several patterns from the 1970s Pilot Custom, namely some rare variants such as Heart of Sutra Sterling Silver, Heart of Sutra Lacquered, Bible verses, Tree Bark, Geometric and one of them is Fabric Etched. Highly collectible for those who have already jumped in for the old Custom Pilot collection with an inlaid nib which is quite popular and sought after, namely the black etched stripe pattern model.
