Dial-A-Matic

Don't the graphics on the box just scream 1950s? The box is easily half the pleasure of owning this calculator.

This is a pretty nice device, with a very positive "clicky" feel to turning the dials. But the mechanics are not easily able to make a long chain of carries. The amount of force it requires to transfer 1/10th of a turn on the units gear to a likewise turn of the ten-thousands gear seems to risk breakage. Nevertheless, it's a usable device and probably readily affordable because of its all plastic construction.