Perpetual calendar

Perpetual calendar of volvelle form, with the outer discs missing. The calendar is made from a French coin that is made of silver. One side of the calendar and outer edge are the original coin, which depicts Louis XVI. The other side has the days of the week in English and dates.

Object Details

ID: AST0692
Collection: Astronomical and navigational instruments
Type: Perpetual calendar
Display location: Not on display
Creator: B Du Viv
Date made: circa 1780
People: de France, Louis Auguste
Credit: National Maritime Museum, Greenwich, London, Caird Collection
Measurements: Overall: 2 x 40 mm