This set sports the pencil with the lead cartridge. There is a printed banner in the box that says "Now with Revolutionary CARTRIDGE PENCIL. Ends messy lead handling forever!". The box is #139/227 dated 10/67. The box is likely original to the set, however, I cannot be absolutely positive because it was found in the wild, likely NOS. The set has the rounded button caps so I know they're pre-1973.
The cartridge is identical to the refill being offered on ebay at the moment. See that item 130303368221 here. Even the script font on the hang package is the same as the banner in my box.
I suspect 1967 is probably correct for a release year or close to it. Can anyone confirm what the production years are for the pencil lead cartridge style?
This is a timely question because I understand that Geoffrey Parker is collaborating on yet another book; this time it's on the famous JOTTER.
Edited by MLKirk, 24 September 2009 - 01:44.