Bought myself another piece of drawing equipment from the 70ies. Takes some practice for the really small and really big radii. But what I am somewhat confused about, is that there's two of this one tool, that I assume is used to hold the compass lead as as a pencil. But they're slightly different lengths. And I just can't figure out why...

Migraine

2 minutes per face. Turns out that's a bit too short for me right now.