Kingson £.s.d. mechanical pocket calculator & slide rule with stylus pen. Instructions 1962

This calculator (1962) from the pre electronic calculator era uses a sliding mechanism  to do addition and subtraction in £.s.d. There is a stylus pen to engage in the calculation slots. To the rear is a slide rule for logarithmic multiplication and division. Has the original soft plastic case, instructions and newspaper ad. clipping from when it was bought at a cost of 8s 9d. The calculator has a pull out clearing handle that resets the columns to zero. An intriguing and interesting relic.

Dimensions:
Cased: 17cm x 5cm x 1cm

Weight: 60gm

Condition
Excellent with no restoration or damage. Complete