Watch List notes:

Guatemala (struck in London, England), proof brass 1 centavo de quetzal, 1939, PCGS PR64, finest and only known example in PCGS and NGC censuses. KM-249. Somewhat muted luster for Proof and slightly dull brass color but devoid of marks or wear and the only specimen (so far) at either PCGS or NGC. PCGS #24359006.

Estimate: $500-750