Pic DC 55
pendulum balance was used to weigh gold coins circulating in England
during the l8th century. It is marked Anscheutz & Co. No.1524, showing
that the firm had already made a considerable quantity. The company was
run by Valentine Anscheutz and John Schlaff in Denmark Street, Soho,
listed in London trade directories between 1761 and 1781.
The gold coin in doubt - a Johannis, a moidore, a guinea, or one of their
subdivisions - was placed in the pincers and weighed in air and water. The
instrument was self-indicating so no adjustment was necessary, and two
sets of graduations were provided, one for air and the other for water.
The division were in units of 6 pence, and for a 18 shilling coin, the
difference between air and water was equivalent to one shilling, or in
other words, the buoyancy in water was equal to 6 grains.
The scale folds back into the flat mahogany box, which is only l2mm thick,
(1/2"). The polished brass pillar and pan contrast nicely with the
silver plated quadrant and the royal-blue paper lining in the box. When in
use, the lid can be partly closed against the back of the pillar, to
prevent the scale falling back.