The "Small" Metal Calculator with brown leather case
Small Pocket Calculator with leather case
Physical Object
2019.06.20.02
This calculator packs all the functionality of a basic pocket slide rule. It can multiply and divide, and do square roots, reciprocals, sines and logarithms. It has the scale length -- hence the precision -- of a 15 cm straight slide rule, but fits in a beautiful leather case a mere 6 x 6 x 1.5 cm in size. You can identify the different scales in the image below.