oh man! Thanks for posting this
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Super-interesting reference material: it shows the “Mars-Non-Print” lead (in woodcased pencil form, and in both 2.00mm and 0.5mm), but not the “Mars Non-Photo-Blue” lead in both 2.00mm and 0.5mm. I wonder whether the non-photo-blue came after or before that year.
Also, that 783 clutch pencil is super-dope, and the corded electric eraser with full-metal grip is probably one of the last pieces in that sub-genre, after the major models from Charles Bruning, K+E, and a few other manufacturers. Then came the ones with plastic grip sections, clearly inferior in terms of quality, and then those tiny battery-powered erasers which still survive today, but I never managed to appreciate.
Man I need a serious corded electric eraser…
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