[1]. https://www.chessprogramming.org/El_Ajedrecista
[2]. https://www.computerhistory.org/chess/stl-430b9bbe92716/
[3]. https://mitmuseum.mit.edu/collections/object/2007.030.005?qu...
[4]. https://en.wikipedia.org/wiki/Ca%C3%AFssa
Technically, these electro mechanical machines may not qualify as computers, but still, what a scoop it would be to get them!