
Per what I consider ‘credible’ hand annotation on the verso, a night static-firing of the Saturn C-1/I SA-T first stage at the Static Test Tower (STT), aka T-Stand, aka Facility/Building no. 4752, Marshall Space Flight Center (MSFC), some time during 1960.
If indeed a night firing, that, along with the presence of the Jupiter rocket/missile, and the STT still bearing the “U. S. ARMY” lettering, should allow conclusive identification of which of the following dates it is.
Just my two cents, but it looks like eight engines up & running, thus eliminating April 6, and by June, maybe even May, the NASA meatball logo may/should? have replaced the U. S. Army lettering, leaving April 29 as the most likely date. Who knows:
April 6, 1960:
Four of the eight H-1 engines of the Saturn C-1 first-stage booster were successfully static-fired at Redstone Arsenal for seven seconds.
Saturn Illustrated Chronology, p. 11.
April 29, 1960:
At Redstone Arsenal, all eight H-1 engines of the first stage of the Saturn C-1 launch vehicle were static-fired simultaneously for the first time and achieved 1.3 million pounds of thrust.
New York Times, April 30, 1960.
May 26, 1960:
Eight H-1 engines of the first stage of the Saturn C-1 launch vehicle were static-fired for 35.16 seconds, producing 1.3 million pounds of thrust. This first public demonstration of the H-1 took place at Marshall Space Flight Center.
Rocketdyne Skywriter, June 3, 1960, p. 1.
June 15, 1960:
The Saturn C-1 first stage successfully completed its first series of static tests at the Marshall Space Flight Center with a 122-second firing of all eight H-1 engines.
Rocketdyne Skywriter, June 24, 1960, p. 4.
All above per/at:
www.hq.nasa.gov/office/pao/History/SP-4009/v1p1.htm#1960-a
Although the photo paper bears no watermark, it has the look & feel of the earliest heavy “A KODAK PAPER”.