From Cycling, August 31, 1985:
“AFTER the long-established Cinelli M71, after the recently-introduced Look system, the market for racing pedals which dispense with toe-clips and straps is being chased by Adidas, who have produced System 3, a shoe-and-pedal combination launched during the Tour de France.”
It’s interesting that all of my own bikes are clip or flat pedaled, I recently sold my only pair of SPD pedals and clipless shoes, and my only pair of cycling shoes are some 2006 Adidas Vueltano road shoes that I had a normal rubber sole installed on so they would work with with clips (more on these later).
If you’re interested in comparing these early systems, Speedplay has an excellent museum of them.