History of polymer-bound fine leads

[stu-dying]

@Alain4s

• Staedtler release their first 0.5mm polymer lead and pencil “Micrograph 770” [and Pilot release their first polymer lead, the NEO]

This entry is now known to be incorrect, STAEDTLER’s first pencil and first 0.5/0.7/0.9 mm polymer leads were released earlier, with the date being somewhere from March 1966 at earliest to October 1967 at latest.