Stephenson’s little adder
Agents wanted!
Category: Mechanical
Alpina or Curta?
Battle of the handheld calculatorsBlue Velvet
The lovely Adix calculator“Iron Felix” meets the Odhner calculator
Two pinwheel calculators comparedThe ingenious Ifach adder
A carry mechanism with no gears!Troncet’s OTHER calculator
The Totalisateur dial adderBloch’s Gewicht-schnellrechner
A mechanical nomogram for weight calculationsWebb’s Adder
One curiously shaped calculator!The Ken+Add, inside and out
Small adder, big qualityLocke’s “pocket” adder
Well, at least it's pretty!Black Gem
The Golden Gem adding MachineOdhner Pinwheel Calculator
Carrying fine childhood memories...