Denny Anspach asked (in part):

...a very early Varney metal
reefer 51004 (R-27, 1950-51) has aluminum sides, ends, and roof, but
with green lettering.

I am pretty sure this one was inspired by IC's lone aluminum reefer,
actual number 51000. Whether the prototype had green or black lettering
isn't clear from the B&W photos.

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