Defying style, dimensionality and usability since 1986… I’ve found the duo-pen 626bc more practical than the single refill 606bc as it is easier to change the refills. The wilder designs with colored sprinkles are out of reach for now. And the suspicion that SEED provided the eraser guts for the 636eh is kinda confirmed as well.
I used to dismiss these as a gimmick design, but you know for nice quality notebook folders, the flat design of the 606 works so well. Great collection, Kelvin! I like how TOMBOW played with the silver/black/white motif.