I grew up on 35mm (to the point of using a range-finder type 1950s-era German camera with a separate hand-held exposure meter for 2 years before my 9th-grade school-sponsored photography class the summer of 1977).
I still have my Nikon FM - the only thing electrically-powered is the exposure meter.
Yes, this does look like it was 35mm, shot with a color-rich film - different film lines produced different color balances and intensity, Ektachrome (slide film) tended to be slightly bluish, Fujichrome (also slide film) tended to emphasize greens, Kodachrome (another slide) produced brighter colors across the spectrum than the cameraman saw when the image was taken.
Digital cameras are certainly capable of timed exposures... my Canon SX-40HX has an easily-set exposure timer, which I used to great effect during the 2017 solar eclipse (I was in the totality path, outside Howe Idaho). I have also used it for night shots of the moon through wildfire smoke outside Colorado Springs, Colo in July 2013.