|Batteries:||AA x 4|
Early Casio model, quite a nice horizontal design and a root function.
This is one of a series of Casio "Mini" calculators, the first one of which was introduced as a low price calculator in 1972.
The display has a peculiarity, the zero is lower case! I don't know any other calculator that has a lower case zero.
The number 170.50 for example looks like this:
The calculator runs on batteries as well as on a power adapter.
©2009 Ernst Mulder