The Seamaster 30 in the photo sure looks like tritium based on the colour. I have a 1963 Seamaster and it is tritium. Radium lume in good condition is usually beige and tritium generally has a greenish hue. They can both go an ugly dark green when oxidized.
I have a very early 1960's Solar that has a radium dial and tritium hands. The watch is apparently all original, and pristine condition, so they probably ran out of radium hands but still had some dials left over. The hour markers glow all night long but the hands only glow for 2 minutes immediately after exposed to light.
