Slide rule workshop

Chris' mystery slide rule Nr. 1

G “HH” Wooden slide rule

Click images for magnification

Data:

  • Timber with plastic scale cover in leather look sleeve
  • German text
  • Looks like FC or?
  • No name, but “HH” at back side
  • See also Herman's Archive item 2613

Questions:

  1. What is “HH”?
    See Wer waren Koch, Huxhold & Hannemann ? (translation) and Rechenschieber Rietz Universum Leo van der Lucht
     HH is a known but obscure German maker A.A. Hoehler from Hohen Neuendorf — hence the HH company name. It looks like they only made one model, a Rietz fittingly called UNIVERSUM. David Rance