ALRO-made ruler unusually with a cursor for analysing ECG printouts of the cardiac Sinus Rhythms

Hatters Gauge - for measuring the size of a hat but unusually calibrated in metric & imperial

Glovers Rule - for measuring the length of a glove

Unusual non-logarithmic squaring desktop QR 41 model by Dennert & Pape (D&P)

Colour combinations slide rule for Interior Designers

Professor Fuller’s Drum Calculator from 1878 - made by W.F. Stanley

Modern Kienzle wristwatch with slide rule bezel calculator

Ruxton Multi-Vider drop-lead pencil & slide rule

Rare Otis King Model N for Retail & Monetary with white scales (422 & 424) on a black background

Darnley’s Rotable Lightning Calculator/Pencil Case

Design for this Antenna Radar Beam Pattern Detection slide rule was classified during WWII by UK & US governments - made by Lawrence

Makeba Kombinator pencil & slide rule

Rare Carbic-made Fischer Calculator

Specialist slide rule for a national home cable radio broadcasting system offered in The Netherlands from 1930 to1970

Smallest drum (≈ 2.4m) made by LOGA