4.5v (3x AA batteries).
Display is 8 digits, red LED.
Four functions, %.
75 x 139 x 20 mm (2.9" x 5.5" x 0.8").
Okhai of Scotland (see below).
Probably made in Hong Kong.
This model is similar to some models under the Memory Master name.
The Okhai calculator was branded and marketed by the brothers Ibrahim Okhai and Aziz Okhai who came to Scotland in the 60's from Malawi. They started out as painter/decorators, and through one means or another, ended up as traders in many own-branded items, including the Okhai calculator. They sold everything own-branded from corned beef to drinking straws. Also, showing innovative flair they were very successful in a variety of fields especially packaging, in which they continue today in Dundee, and also marmalade and confectionary, soft drinks, and stationery.
Thanks to Yusuf I. Okhai for details about the Okhai companies.
© Text & photographs copyright Nigel Tout 2000-2017 except where noted otherwise.