As regards the B&W H-19 photo, I don't have any good info on the trim color. The photo was originally published in the Japanese magazine Koku-Fan, and I've cropped it slightly for emphasis on the windshield.
I am reasonably certain that the overall color is Light Gull Grey, as this was an appropriate color for helos in active units in the late '50's. I asked one of my Japanese co-workers to read the photo's caption, but he said it gave no info about the trim color.
In this case, I would have to guess that it might match up with the 'doghouse' coloring seen on Marine H-34's in the early VietNam period, but I've never been able to make sense of how those colors were assigned to the various squadrons.
(Personally, I think it would look great with red trim, but that's just me.)
""Expect nothing - that way you won't be surprised when it's precisely what you get.""