Garco which I saw in an article in the Junior Sketch in the mid 50s.
Peter Holland's Tri Pedal Ambulatory Locomotive from the mid 50s, which entranced me as soon as I saw it in the MAP plans handbook.
Dr Fiorito's Giant humanoid robot Cygan (sic) in Radio Control Models & Electronics, September 1960.
I saw this outside a Ford dealership in (I think) Leeds in about 1963.
Actually Cygan was really named Gygan.
The robot Creep
in Radio Control Models & Electronics, April 1962.
Shakey from 1968, which I saw in an issue of Science Journal in September 1968, sadly this went missing during a move in 2001.