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One speed with a simple relay controller which only has enough logic for the lift to go directly from A to B without picking up any other calls on the way.
Notice that the floor position only lights when at the floor? Reason - simple one speed controller! When the lift passes a floor it rotates the floor selector to the "AT FLOOR" position. This is when the bulb lights. If this floor is the lift's destination then it'll stop. If not, as soon as the floor has passed the floor selector moves round to the "BETWEEN FLOOR" position and the bulb goes out, until rotated around again at the next floor, and so on.
To see this rotary floor selector in action, select this link:
• (2/4) PROBABLY THE BES...
This lift appears to be completely original.