Vintage Unique Universal Pocket (17cms) Slide Rule + case and full instructions.

In excellent condition, this Unique pocket slide rule dates from the late 1950s/early 1960s. It belonged to my father who was a Technical teacher at a Secondary School and comes complete with its vinyl case, full (half hour) set of instructions and a second set of quick instructions for its use.

It has a set of Trigonometrical Ratios on the reverse side.

Please refer to photographs to confirm condition.