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Hitachi KK521 |
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Hitachi KK521 Display is 12 digits, separate green vacuum-fluorescent tubes. 4 functions, memory. Uses a mixture of large-scale integration (LSI) integrated circuits and smaller ones. Main ICs - Hitachi HD3234P, HD3235P, HD3236P here date coded early 1972. 218 x 254 x 80 mm (8.6" x 10" x 3.2"). ~1972. Made in Japan. Has a pull-out carrying handle. Hitachi also produced desk calculators for Singer Friden, see the Singer Friden EC1117. |
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Vintage Calculators |
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© Text & photographs copyright Nigel Tout 2000-2008 except where noted otherwise. |
