Pocket Adding Machines/Calculators

Crown Calculator

This example is probably from the 1940-50s when it would have cost about six or seven shillings (30-35 pence in today's money). The length is approx 6.3 inches (16 cm). Width 1.5 inches (3.8 cm). Weight in case 50gm.

I do not have a name for it so I have called it crown - from the logo image on the top.