Product images of Amplitude compass
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Manufactured in the UK
All products are printed in the UK, using the latest digital presses and a giclée printmaking process.
We only use premium branded inks, and colours are independently verified to last between 100 and 200 years.
Magnetic compass designed for measuring the sun's amplitude. The compass card is manuscript and hand-coloured. The North point is indicated with a coat of arms, and the east point is also slightly embellished. The card is graduated to 32 points and quadrantally in degrees. Around the centre is written, 'Manoal Ferreira Portugal a Ces Cm Lisboa no Anno de 1780'. The needle is a single flat bar attached to the underside of the card, which also has some pieces of wax stuck to it, presumably to balance up the card when in use. The compass bowl is made of rosewood and is weighted with lead and glazed. It is lavishly decorated internally and has fitted brass sights and brass gimbals. The outer box has brass handles ad removable panels to allow sights to be taken, and has a coloured glass shade.
- Image reference: D5208
- National Maritime Museum, Greenwich, London