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casio fx-19

the fx-19 has the chunky old-style build from 1976 slightly evolved from the baroque style of the fx-101 but appears functionally identical to the later fx-29, calculations appear to give the same answers as well.

the function set and style are evolved from the earlier fx-101, offering fractions, gradians mode, statistics and also the luxury of a 10^x button. the keys and case are more rounded but the layout is similar.

taking 4 `AA' cells rather than two, it has a slightly larger and clearer 8 digit vacuum display. although according to the label claims to draw only 0.35W instead of the 29's 0.75W.