Watch List notes:

Clump of one Mexico City, Mexico, cob 4 reales, Philip V, assayer not visible, on chunk of encrustation as found. KM-40. 31.97 grams total, about 1-1/2" x 1-1/2" x 1". Solid coin (darkly toned) with full cross side completely exposed, the other side fused to a thick chunk of orange and gray encrustation (likely containing an iron object), very neat for its size. From: Spanish 1715 Fleet, east coast of Florida
($250-375)