Antiques: Made by a king, this slide rules

Q  My dad brought this slide rule from England when we came to Canada in 1960. He used it through school during university in Birmingham. We have the original box and the eight-page instruction booklet, which outlines the method of operation including multiplication, division, proportion, percentages, powers, roots, constant factors and Sterling calculations. It covers ‘K’ and ‘L’ models. Closed, it is about 15 cm long (six inches). Thanks.Read More