tail light identification

Hoping someone can give me a positive I.D. of a tail light I'm going to attempt to post pictures of. It has "CRILO" lettered in the body. Sadly there are no numbers visible on the mount except a very tiny one next to one of the bolt holes that looks like the fraction 9/16, although the slash is parallell not diagonal. I'm guessing it fits somewhere in the 35-37 range of trunkback models, and based on the angle of the mount I'd sau Jr. models like 120? But thought I'd ask the real Packard afficianadoes of the world to either verify or tell me I'm full of baloney. Thanks in advance guys for any input