It is definitely the Consolidated Freightways shipping company's logo. What's more; under magnification, the logo looks crudely hand-painted on the dial - like the original owner had a Saturday afternoon with nothing better to do.
In fact, I'd remove the crystal and check the whole dial under high magnification, because I wouldn't be surprised if the numerals were hand-painted as well.
The watch itself isn't special, so the hand painting does nothing to "ruin the value" of the watch. Just the opposite in fact.
The hand decoration adds a certain charm to the watch, as well as a special connection to your father.
Take care of this watch and I wish you many joyous years of ownership!
P.S.- wouldn't you say those numerals are closer to art deco than they are art nouveau?