The Citizen 810R, released in 1974 is a sturdy device, equally at home on a desk or in hand and embodies the transitional period between bulky desktop machines and truly portable calculators. Measuring 87mm x 150mm x 33mm and weighing a substantial 276g including its rechargeable batteries, the 810R was …
The Citizen 801D calculator, released around 1976, is a sleek device, with its light grey front and dark grey back. It measures approximately 82mm x 136mm x 25mm and weighs a mere 132g without batteries. The calculator’s design showcases a rounded two-piece plastic case, featuring a flush, wrap-around green plastic …
The Citizen 800R calculator, released in 1973, represents a pivotal moment in the evolution of handheld computing devices. This sturdy machine, equally at home on a desk or in hand, exemplifies the transitional period between the first generation of electronic calculators and the more sophisticated models that would follow. Measuring …
The Citizen 800D calculator, manufactured by Citizen Business Machines Inc. in Japan, represents a notable entry in the realm of handheld electronic calculators from the mid-1970s. Released in 1976, this device exemplifies the rapid technological advancements of its era, offering users a compact yet powerful computational tool. Measuring approximately 82mm …
The Citizen Eight calculator, introduced in 1976, is a fascinating piece of technological history from the era when electronic calculators were becoming increasingly compact and affordable. This palm-sized device, measuring 64mm x 100mm x 22mm and weighing just 84 grams without batteries, epitomizes the drive towards miniaturization in consumer electronics …
