The rarest pencil is a Pilot Quartz. I have only had 1 in a fountain pen. This is a pencil with a quartz clock. It also plays music. All is working.
This Vintage Pilot Mechanical Drafting Pencil 0.5mm HH-200k
is called 1+1 and is the QUARTZ watch with a 0.5 mechanical pencil. Clock also plays music if you hold down 2 buttons.
From Japan NOS Vintage, RARE
Original Box and Papers.
Working (Takes a regular Hearing Aid battery)
As the MYU/MUREX line increased, many variations OCCURED.
This is a push button variety that is great for sketching.
very cool pencils.
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