Just a photo: A blister-packed Staedtler Microfix S 773 05.
There are great details here: the name “Fullslide Fineline Leadholder”, the Mars head which in its shape at the time is reminiscent of a full-face helmet, the strange ST and DT ligatures in the Staedtler lettering and the use of Eurostyle. – The Microfix S 773 05 (albeit in dark blue) was my first “serious” mechanical pencil; I got it around 1980.