Seiko Calculator Watch C153-5011

Calculator On The Wrist

Digital ➕➖✖️➗ Saturday!

In the mid seventies, pocket sized calculators had hit the market for just a few years and gained some popularity.  Brands like Casio, Texas Instruments, Sharp, Panasonic etc. were selling those calcs like hotcakes.  In a different category, Pulsar (before being acquired by Seiko) and HP also had their own inventions, have a calculator built inside a watch, with an LED display.  However, they were very very pricey.

Then in 1976, Seiko came out their first calculator watch, C153, with the use of LCD as the display. The chunky and robust watch case is a signature of their early digital watches, mounted with a 22mm wide solid link bracelet, this legendary calculator watch is no featherweight. It's history, a must have for any vintage digital lover. Mine is from 1977 and came with the original Z-clasp version for the bracelet, an important member of my 'Seiko's First' collection.

Seiko C153 advertisement 1
Seiko Calculator C153-5011

【數碼計算星期六】

1977年,精工推出他們第一隻內置計算機功能的跳字表。當時價值昂貴,非當時一般人會選購。隨後十幾年也有後數款續型號推出,至九十年代初,計算機手錶已消失於產品目錄。大有可能是此類手錶已被另一大牌子卡西歐以低廉價錢及一樣可靠的品質,奪去市場。41年前尖端科技,已成今天歷史收藏及發展見證。此乃77年10月,產於日本。

Seiko C153 advertisement 2
Seiko C153 Advertisement 3

About the Author Eric

Eric has been a gadget lover for decades and had been collecting affordable vintage since the nineties. With his passion for vintage watches, he had been sharing thoughts and photos in interest groups, with his intention of raising public interests on forgotten classics.

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