The Four Peers ring, an important Jacobite relic, is to auction at Lyon & Turnbull in Edinburgh.
The piece, valued at ?�15,000-20,000 ($22,759-30,346), is among the highlights of a sale of materials drawn from Scottish history on May 13.
Lord Francis Oliphant of Gask commissioned a number of the rings in the mid 18th century to memorialise those who fell fighting under Bonnie Prince Charlie at the Battle of Culloden.
The title, Four Peers, refers to the earls Lovat, Balmarino, Kilmarnock and Cromartie - all of who were executed for treason in the aftermath of the battle.
Colin Fraser of Lyon & Turnbull commented: "It is arguably the finest of the Four Peers Rings in survival and has excellent provenance coming from the James Graham of Arith Collection.
"Three others are known to survive, all within institutional collections including the National Museums Scotland and two within the British Museum�Ǫ
"The allure of Charles Edward Stuart, the "Bonnie Prince Charlie" of legend, and his romantic but ill-starred campaigns continues to this day."
An ivory and silver flute belonging to the prince is also on offer, with a valuation of ?�4,000-6,000 ($6,075-9,112).
The lot was seized from the home of a Jacobite supporter by a British officer in 1746.
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