Agree with PaperTiger, Fokker/General Aviation (later North American) FLB/PJ-1, with twin P&W Wasp R-1340s. Five were built for the USCG, but only one was converted (by the Naval Aircraft Factory) to tractor configuration and redesignated PJ-2. The style of fin/rudder markings is odd, more in keeping with contemporary US Navy than USCG practice.