This Privateer was photographed two months after it was registered (on 16Sept1970) to
Hawkins and Powers Aviation Inc
of Greybull, WY. The previous owner was Rosenbalm Aviation of Medford.
Note that number 1 & 4 engines are R-1830s (as originally fitted)
whereas numbers 2 & 3 are R-2600s.
See another Ron's Archives photo of N6884C in H&P service. Google: PB4Y-2 59701 N6884C tanker 84