Reverse Side is Graphic Art - Not an Actual Scanned Image

Obverse Design Top line across says "U.S. ARMY" in large letters. The second line across says "CONST. CM." in small letters. Under that line is the check number in large numbers, "136" in the example above. Curving along the bottom edge in medium-size letters is the name "ALBROOK FIELD".
Reverse Design Blank.
Metal Brass Size and Shape Round 38 mm in diameter with a slot or oval hole at the top.
Dates Issued Unknown, but sometime between 1924 and 1949 during the time period when Albrook Field had that name. It was first called Balboa Fill Landing Field in 1922 and was called Albrook Air Force Base after 1949. This check was also probably issued before 1947 when the Air Force became a separate service (before that it was part of the Army).
Issurer U.S. Army Air Force based at Albrook Field.
Numbers Issued Pieces in collector hands include #136.
Rarity Very Rare. Manufacturer Unknown. Source Nicolas Liakopulos Collection.
Varieties None known.
Function This was most likely a tool check. Tool checks were used to control access to tools. The worker would turn in the tool check in exchange for a tool. If the tool was not returned, management would know which employee had checked it out based on the number. I would appreciate from anyone who can add anything to the history of this piece.
Population Count Known specimens are as follows:
  1. Check #136 - Nicolas Liakopulos Collection (pictured above).