Do have any idea on how to emulate these tones? I like to emulate the fast delays. Are these stacking delays?
That is most likely an Analog Tape Delay or tape delay simulator pedal. These were very popular. Pink Floyd used it a lot and Jimi Page liked to use it live during Dazed and Confused while playing with the bow.
I think the Echoplex Ep3 was the one used circa 1970.
Some had multiple tape loops to really go crazy.
Jimi Page (@ 1around 11:00)
Modern style emulator:
Here's one that is homemade: