Date   
Dietzgen Rules By Maciej M. Sysło · #1268 ·
Faber Castell 2/84 Mathema By Maciej M. Sysło · #1260 ·
Offtopic: Discrete mechanical calculators - the "loglog" type / four-operation machines By Maciej M. Sysło · #1088 ·
Offtopic: Discrete mechanical calculators - the "loglog" type / four-operation machines By Maciej M. Sysło · #1087 ·
Extremely Rare Flynn Universal Trigonometric Semi-Circular Slide Rule By Maciej M. Sysło · #1067 ·
Extremely Rare Flynn Universal Trigonometric Semi-Circular Slide Rule By Maciej M. Sysło · #1060 ·
Extremely Rare Flynn Universal Trigonometric Semi-Circular Slide Rule By Maciej M. Sysło · #1057 ·
Discrete calculator machines vs. logarithmic rules: Early and later relevance?! By Maciej M. Sysło · #1047 ·
Off topic: Discrete calculator machine replica By Maciej M. Sysło · #1043 ·
American Slide Rules By Maciej M. Sysło · #375 ·
Calculators By Maciej M. Sysło · #130 ·
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