Vintage District of Columbia Washington DC public vehicle tag license plate

Click image for more foto

I dug this brass plate with a shovel and with the aid of a metal detector in the state of Maryland. I have never been able to find any information on this tag and I"ve never seen another one like it.
#571

Sale Price: US $349.00

Other Washington License Plates
1954 Washington License Plate 63-090 C1954 Washington License Plate 63-090 C
Restored 1939 Truck Washington LicenseRestored 1939 Truck Washington License
Restored 1939 Pair of Washington LicenseRestored 1939 Pair of Washington License
Restored 1938 Pair of Truck WashingtonRestored 1938 Pair of Truck Washington