I had thought that, too, but the Nha Trang First Flight C-123s had a donkey d*ck RHAW antenna above the cockpit. This one doesn't. I believe by the time that Ikar shot the photo, the NC-123Ks had lost the nose radome and had been given to the Thais. They kept the special paint scheme that both types shared. I believe that I've seen a better photo where you can see the tail number and demodded nose.