1854 (1855) Commander Duncan Imgraham / Rescue of Martin Koszta. Original Large Size. Bronzed Copper. 102 mm. Julian NA-26. MS-64 BN (NGC).We are pleased to have the opportunity to offer multiple Choice examples of this large and impressive naval medal in this sale. The present example exhibits handsome reddish-copper and golden-brown patina on boldly struck, overall smooth-looking surfaces. A few minor marks and generally small spots in the fields are all that stand between this lovely medal and an even higher numeric grade.