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The most notable brand is the Casio Databank series, though watches made by Timex were also popular. Several watch manufacturers have made calculator watches over the years, such as Pulsar and Timex, but the Japanese electronics company Casio produced the largest variety of models.
In the mid-1980s, Casio created the Databank calculator watch, which not only performed calculator functions, but also stored appointments, names, addresses, and phone numbers.
View a picture of the UC-2000 mounted in its keyboard here.A calculator watch is a digital bracelet with a built in calculator, usually including buttons on the watch face.Calculator watches were first introduced in the 1970s and continue to be produced, despite falling from their peak popularity during the 1980s.Holding the CNT darkens the display; pressing both the SFT and CNT lightens it.The other buttons are intuitive for anyone who’s been around a keyboard. It was sold in a sleak, silver cardboard box with orange trim and included a large instruction book; the watch and keyboard were set in black sponge material.
The D409 was their first model to offer on-board storage.