Do have any idea on how to emulate these tones? I like to emulate the fast delays. Are these stacking delays?
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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: