Limited to just 1,000 strikes, these .925 Silver Medals were struck by the Royal Mint in honour of 300 years of The Royal Greenwich Observatory.
- Medal #1 celebrates the Ramsden sextant (Jesse Ramsden)
- Medal #2 celebrates the armillary sphere.
- Medal #3 celebrates the first marine timekeeper (John Harrison)
Each medal weighs 3.2 troy ounces for a total of 8.88 toz net pure silver. For as good as these look in the pictures, I think they look even better in hand.