Above photo scanned from "THE POWER PLANT", a Pratt & Whitney newspaper - dated 26 Feb 1959. Photo via Dave Kuntz & Wayne Baggstrom. (Note the wing fence and exhaust of either a YJ75-P-1 or J75-P-9 engine before being retrofited with the later J75-P-17 production engine). Below article scanned from "CONVAIRIETY", a Convair newspaper - dated 07 Jan 1959. Article provided by Jim Day.