Earliest Pop's hat?

This photo dates from 1956, and judging by the cool weather attire, I should be five years old. That's my brother in the watch cap (14) and my sister (2) looking on in amusement as I have just been finned by a not-dead-yet sand bass.

I can't quite tell what my hat (and jacket) are saying here. At first glance, I look like one of Brando's motorcycle hoods in The Wild One (Marlon himself?), but more likely this is an attempt to emulate one of my childhood heroes, Lt. Col. Jimmy Doolittle of The Tokyo Raid fame (Thirty Seconds Over Tokyo).

However, if you consider that my brother's attire looks to have been influenced by On The Waterfront, it might be safe to guess that my mother had a thing for Brando.