Details:

An early machine using LSI chips and one of the very first to feature an LCD display. According to Sharp, the much smaller and lighter

EL-805, introduced in mid-1973, was the first commercially available LCD calculator, equipped with the same type of display.
The EL-805 was soon followed by the slightly improved, but equally priced, EL-805S. Later that same year, the much cheaper EL-808 was also introduced.

The energy-efficient Dynamic Scattering Mode LCD made it possible to use AA batteries instead of the large, heavy NiCad cells found in calculators like the Sharp QT-8B. The display is protected by a lid that lifts automatically when the power button is pressed. When open, the lid prevents direct light from falling onto the display. In bright daylight, the display remains very clear; however, it must have been difficult to read under the dim artificial lighting commonly available in the early 1970s.

Usage:

As usual today

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Serial number:

Built in:

Functions:

Power:

Market-introduction:

Production until:

Price:

4012352

Probably Feb 1974 (*)

Addition, Subtraction, Multiplication,  Division

4 AA cells

1973

1974

Fl. 299.-  in 1973  (Source: advert in Dutch newspaper)

(*)  According to www.oldcalculatormuseum.com/t-sharpsn  the serial number for calculators built in the early 70’s contains an indication of production year (first digit) and production month (last digit).