Obverse Design "SHIP'S" curved along the top. "SERVICE" and "STORE" in two lines across the center. "COCO SOLO, C.Z." curving along the bottom (C.Z. stands for Canal Zone). Circle of beads close to the edge. Smooth plain raised edge.
Reverse Design Large incuse "4".
Metal Aluminum. Weight Unknown. Size and Shape Round, 20 mm in diameter.
Dates Issued Unknown.
Issuer Coco Solo. This was a Navy base established in 1918 and initially used as a submarine base.
Mintage Unknown.
Rarity Very Rare. Manufacturer Unknown. Other Catalog Numbers Asociación Numismático's F-109, Henkle's CZ-15 (photo) and Plumer page #3.
Varieties Pieces are known with "1", "2" and "4" on the reverse. Perhaps there is also a "3" variety. The numbers were attributed by Plumer to be ship's watch numbers.
Function Ship's store token.
Population Count Two specimens in collector hands are known to me. I do not know of any recent sales.