I agree. I never noticed the absence of external tanks until I had some of my 35mm slides of Tachi, CCK, and Nha Trang transfered to computer files. I have sent three pictures to Bob Daley to fill in the hole in the production number gallery. I mentioned this absence of external tanks on the aircraft to Bob, but another picture of the rear of 64-0556 and 63-7878 sitting together on the PSP in Tachikawa (was not sure why I took this shot, but upon zooming in it is a picture of another C-130 starting take off roll) and in the picture it looks to me like tanks may be installed. External tanks were sometimes removed for access to repair the fuel quantity instrument system wiring and probes. I have another picture of myself working on the external tank of an unknown number aircraft. I will post both of these pictures in my user gallery.
Lee