Designed in 1948 by Harold Fowler to mark the 50th anniversary of the founding of the firm by his father "William Henry Fowler" in 1898, this is the Fowler's Jubilee Magnum Extra Long Scale calculator.

This was the largest circular calculator made by Fowler's, measuring 120 Mm in diameter, with a 79" long scale extending over ten circles.

In full working order, it has a black hammer finish steel backplate, and clean, legible scales inside a chrome outer body, which is in very good condition.

Weighing just under 420 grams in its original brown leather case which is in very good condition with all of its stitching intact, it also comes with its original 28 page instruction booklet, which while rough around the edges is structurally sound and complete.