2 images taken with a 16mm fisheye lens (Zenitar 16mm f2.8, Sears KSX camera - Pentax K system), Kodak 400CN "B&W" (it is actually bluish and white) film, Kodak pictures on disk.
Photoshop: superimpose ("double exposure"; I can get into this if interested), desaturate, autolevels, additional level play, maxed red, white magenta & blue on one of the layers