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Casio S100X The Special One launches as limited edition flagship calculator

Casio's latest pocket calculator features a black lacquered aluminum housing.
ⓘ Casio
Casio's latest pocket calculator features a black lacquered aluminum housing.
Casio presents perhaps one of the most unusual pocket calculators on the market, as "The Special One" combines a high-contrast display with navy blue digits with a glossy black lacquered metal case and red color accents.

While Casio regularly launches special editions of digital watches, these are rather rare for calculators. Casio aptly calls the S100X-JC1-U "The Special One", as this unusual pocket calculator is limited to just 650 pieces worldwide. Casio manufactures the housing from aluminum.

The finish is lacquered by hand using a traditional Japanese craftsmanship technique to create a glossy black surface with a special shine. Each individual key and the front are framed with a red accent color. The buttons are labeled in gold. The display shows navy blue digits on an almost white background to achieve the highest possible contrast - according to Casio, the FSTN LCD is less reflective and has a higher contrast than most pocket calculators thanks to a double coating.
 


The keys are equipped with switches with a scissor mechanism, as found on many laptop keyboards. This should provide a clearly defined pressure point and even resistance, regardless of whether they are pressed in the middle or at a corner. Three-key rollover should not overload the calculator, even with very fast inputs. The Casio S100X weighs 275 grams and uses a CR2025 battery ($2.99 for a 12-pack on Amazon), which should provide a battery life of seven years with one hour of use per day.

Prices and availability

The Casio S100X-JC1-U "The Special One" pocket calculator is available in Japan for 99,000 yen ($630). The calculator is limited to only 650 units. While Casio has not yet commented on possible international availability, direct import via platforms such as Zenmarket is possible.
 

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> Expert Reviews and News on Laptops, Smartphones and Tech Innovations > News > News Archive > Newsarchive 2026 03 > Casio S100X The Special One launches as limited edition flagship calculator
Hannes Brecher, 2026-03-19 (Update: 2026-03-19)