Uni HB (100 years special edition)

Fantastic Limited Edition of the Uni at the top. Features the 100 years stamp and the fine gold trim. The middle model is the model currently available in stores with NO JIS mark and a barcode on the reverse. The bottom model sports the JIS mark as well as the inscription shown: “marking 30th anniversary."
"metropolitan prefecture.” “Koto” ~ “Printing Business Cooperative Association.” In other words this pencil was specifically made for this celebration. Date of 30th Anniv. is unknown.