via Blue Pencil
“…Linoskala from Linotype GmbH, a two-sided volvelle (wheel chart) used to ﬁnd out characters per cicero for 25 Linotype typefaces (presumably hot metal rather than Linoﬁlm) at a series of [Didot] point sizes. The sizes vary from typeface to typeface with most being available in 6 pt, 7 pt, 8 pt, 9 pt, 10 pt and 12 pt while a few stop at 10 pt and Excelsior additionally offers 7.5 pt and 8.5 pt. Oddly there is no 11 pt.
There are two parts to the volvelle. One is a bright orange wheel with a handle and a viewing slot that has the list of typefaces and the cicero increments (in black) as well as Linotype’s logo. The other is a larger light gray wheel with the typeface names and point sizes in black arranged around its edge.
The volvelle is not dated but it is most likely from the early 1960s since Optima (1958) is among the typefaces.”
Read the entire post here.