Happy New Year!
I just came across a Sanyo ICC-804D calculator - squeezing the four chip design of the ICC-0081 into a very tiny package. Most astonishing to me is the display, it uses very bright and large LED modules! There is no manufacturing date visible but the chips sport 1971 date codes.
One question comes up immediately:
Which pocket calculator introduced the red LED display? Was it the Busicom LE-120A of this Sanyo ICC-804D? I know that the LE-120A was ANNOUNCED early in 1971 but when was it available? Any proof about the first ICC-804D availability?
Any suggestions and comments are welcome.
Regards, Joerg