WE also kept one at Osan to monitor North Korea. I spent 4 years at Yokota with 6091st Recon Sqd and 556th Recon Sqd. Was crew chief on 59-1532 an later on 59=1535
I was at Naha from June 65 to Dec 66. The first set of pictures there is one C-130 that is silver. IF my memory is correct that was an E flight plane. Rumor was all the insignia peeled off and they flew for Air America .