[QUOTE=Ed Sukach]It'll have to be a Kodachrome, as the only alternative would have been Agfa, not readily obtainable in the UK at the time for obvious reasons. I'm pretty sure that colour processes such as Lumiere Autochrome were extinct, and Ektachrome was a post-war introduction (1946) based on 1936 Agfa patents. I have a few Kodachromes from the 40s, from 35mm to quarter-plate; they have survived astonishingly well.Originally Posted by Roger Hicks
The Oxford Companion to the Photograph tells the same story I did about the Capa shots (it's not one of the bits I wrote); it was the only quick, easy reference I had to hand, but it is far from the first place I read it. A quick web search turns up the same story too, including the Imperial War Museum site (who add that only 11 pictures survived) so I fear your memory must be momentarily at fault.