The calculators in these pictures were both made by Sharp and released during the late 70s. They were informally known as sorocal or soroban calculators, soroban being the Japanese variant of the abacus. Another alternative name for it would be sorotaku, for soroban dentaku, dentaku being the Japanese term for calculator. Another name for it would be redundalator. Or maybe not.

Partners & Spade is selling these Sorocals – the one with brown beads is the EL-8048, while the one with white beads is the EL-428 – for $80 (USD). That’s like, a lot of beads.

[via The World's Best Ever,  Retro Calculators & X Number]

The Abacus series of watches has no hands at all. Instead, there’s just a single steel sphere that rolls around inside the watch as you move your wrist around. But as soon as you level out to a horizontal position, a magnet behind the dial stops the ball at the current time. Since there’s no second hand, you won’t be able to tell exactly what time it is, but who cares. You’ll look so cool wearing this watch, that nobody will care if you’re a few minutes late.

Each Abacus watch features a stainless steel case, with a leather strap and either mineral or sapphire glass face. They’re also water resistant to about 100 feet. You can find a wide variety of Abacus magnetic watches from QuestoDesign, ranging from about $150 to $230 depending on the style.