So what does a Frat zog stand for?

Thats really odd because my 41 Dodge coupe, 41 Chrysler coupe and 51 Plymouth coupe all have the tag under the hood that says Body By Briggs. Possibly the cars from the 30`s were by Budd.
chryslerfat, please note that I said "Dodge Brothers" all-steel body, not Dodge. Until 1938 it was Dodge Brothers, and Dodge started in 1939. Here's a picture of my '22 touring car with the early all-steel body.

In its advertisements Dodge Bros. made a big deal about their all-steel body because its competitors were making sheet metal-covered wood bodies, which were notorious for rotting out.

DB new wheels.jpg

DB 9-19-2016-2.jpg