Most older elevators (c. 1979 or earlier) were built with relay logic controllers.

Many newer elevators (c. 1990 or later) are built with solid state logic controllers.

But were any "vacuum tube logic" elevator controllers made? I have never heard of such a thing, but I am curious if such a controller was ever made. If one was made, I would love to see a photo of it.

Note that I am not an elevator technician, but an elevator enthusiast asking this question out of curiosity.