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We know little about Zykkor, except that they manufactured camera equipment and little calculators like these. This little TC-1 is as cute as it is functional giving you the requisite calculating power and full clock and alarm options to boot. Want one? You're in luck, we've got 'em for sale, in black and red!

Very cool calculator by Lloyd's that has two displays, one for time & alarm, the other for computation output. The audible alarm is driven by a module that you plug into the underside of the unit that also hold batteries for power. Ingenious design!

This little Toshiba probably surfaced in 1983 or so. Tiny calculator clock combo.

Casio's AQ-1400 displayed time and day of week in addition to standard calculator functions. Obviously, We can gather that in this time period, calculators with unusual functions like clocks and stopwatches were commonplace and probably a selling point for people. Lord knows why one would need a clock on their pocket calculator but dammit, you had to have one, nonetheless.

Litton Industries' Monroe calculator line is long and diverse--their operations started in the US, but by the 1970s, had moved overseas. This little pocket multi-function model was manufactured in Japan probably around 1982. In addition to clock functions there's a stopwatch, too.

Canon was a big player in the calculator industry throughout the '80s. This LC-34T was one of many models that had functionality beyond the standard mathematic calculations. It also had a clock with an alarm.

Sure, we knew Pierre Cardin produced pants, but calculators too? This is their all-in-one device, assumedly marketed for busy travelling people. It combines a clock, calculator and AM/FM radio into one handy unit! There's a telescopic antenna and the clock is armed with an alarm.

Here's Sanyo's all-in-one calculator, the RPM6950. It's part of the fancy Horizon Collection, a product line that consisted of sleek and innovative products. Don't be deceived by the design, the tuning is not digital. There's a small dial on the top for that.