This is a unique oven-firing test piece. Written on back in almost invisible clear markings in the glaze:
Castleton 1475°F
5-3-72
FLUX S-6-X
Item is listed as NEW because it isn't "used" but it is old and has a few small scratches in the front painting - all are on Washington's cape, and are clearly visible in the closeups of the cape.
I have no idea what it's value as "test piece #1" might be, but this is certainly a very unique piece!
I will gladly try to answer any specific questions.