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Perpetual calendar
Perpetual calendar of volvelle form with a decorative loop at the top, probably for suspension on a watch chain. The two outer discs are made from brass and the central piece is made from pewter. One disc has the days of the week and numbers for the date. The other side has months and information about the sun and moon.
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Object Details
| ID: | AST0691 |
|---|---|
| Collection: | Astronomical and navigational instruments |
| Type: | Perpetual calendar |
| Display location: | Not on display |
| Creator: | Unknown |
| Date made: | 19th century |
| Credit: | National Maritime Museum, Greenwich, London, Caird Collection |
| Measurements: | Overall: 1 mm x 25 mm x 19 mm x 20 mm |
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