Jean_LAMESCH_Sliderules_Collection_BOX_JL10

1768_APPOULOT_LOGZ_T3

1768_APPOULOT_LOGZ_T3

APPOULOT LOGZ Modèle T3, scales in a spiral. One of the most original non-linear sliderules of the collection. Made in France by Léon Paul Appoulot, age possibly 1924-1934. Corpus celluloid with 2 celluloid hands. No case. A report on non-linear Verniers by Dr. Olivier Steffens is here. Daniel Toussaint(+) has some short notes here.