Watch List notes:

COMMEMORATIVE MEDALS BY SUBJECT, Exploration, USA, Elisha Kent Kane (1820-1857), "The Great Arctic Navigator", the "Masonic Medal" in Copper, 1859, by George H Lovett, bust right, above a tablet on which his ship Advance is shown trapped in Arctic ice, rev masonic symbols, NON NOBIS SOLUM ..., 51mm. Rich chocolate brown, virtually mint state, very rare.
The medal's reverse is the same as the Washington Masonic medal (Baker-290). For further information, D Q Bowers, American Numismatics Before the Civil War, pp.158-163.

Estimate: £450-550