Pocket Adding Machines/Calculators

The Bitish Calculator Model B For £-s-d

The British Calculator Model B. Supplied in fitted leatherette case with blue velvet and silk lining inside. A peg is supplied for inserting into the holes and moving the disks to the correct numbers. The case outside dimensions are 6.1 inches (15.5 cm) square. The result shown in the £-s-d window is 231 pounds 2 shillings and 10 old pence (£231/2/10).

Note: The UK operated in the Pounds-Shillings-Pence (£-s-d) system until our currency became decimalised.

Further note: There were 240 old pence to the pound. 12 old pence were equal to 1 shilling. Half a crown was two shillings and sixpence and a crown was five shillings. There were 20 shillings to the pound. Not to confuse the issue too much but, there were 21 shillings (£1.05 today) in a guinea, which is probably still used in quoting professional fees although it went out of use in 1813, just before the battle of Waterloo. Maybe - just maybe - there may be a case for decimalisation after all?