This is the reverse of a silver touchpiece of King Charles III (the 'Young Pretender'). The touchpiece dates from 1766.
The reverse has a representation of a ship. The Latin inscription translates as 'Charles III of Great Britain, France and Ireland, by the grace of God'.
When James VIII (the 'Old Pretender') died in 1766, Charles assumed the title of King. He continued the practice of 'touching' for the Kings Evil - scrofula (tuberculosis of the lymphatic glands).
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