Do any pre-TK-40 colour cameras exist?

[Aussie Bloke]

Hi all.

I've been looking to find out on the net if any of the early era colour cameras exist. Haven't heard of the existence of colour cameras earlier than the TK-40. I've asked Chuck Pharis himself and even he doesn't know of the existence of any experimental pre-TK-40 colour cameras. I'm assuming if Chuck doesn't know of existing pre-TK-40s then no one would know, but just in case I'd throw the title question anyway, do any pre-TK-40 cameras still exist?

Some of the experimental cameras I have in mind are the 1951 black tank prototype version of the TK-40, the 1951 CBS sequential field camera, the single tube RCA colour camera made late 40s that resembles a TK-10 or a 40s Dumont IO camera, the experimental GE cameras made in the early 50s http://www.farewellanalog.net/gecamera3.jpg and of course these really rare NBC experimental colour cameras dating about 1947 see pic below. I'd love to know of the existence of any of the experimental colour cameras predating the TK-40s.

Cheers
Troy