Beat ya to it.

Thats what got me to the last image I posted.
Maybe a 39 Master??, Chevy, Hood Ornament, Fits 1939 Chevy Master cars, 11 1/8" long x 1 3/16" wide x 1 3/8" tall, Base is 10" long with 2 mount holes 5 1/4" center to center,
found some pics on taillightking that look like that.
I didn't see it on Tail Light King but your description of it fits perfectly, right down to the two mounts ... all the others I've seen are three or more.