Steven Willis is correct. The one in the photo he offered is a model 99:
However... this was one of the earliest ones offered. It featured both smooth polished spyder arms AND crank arms looking very similar to the model 93 (which tapered straight and wide all the way around the crank axle holes).
Later 70s versions were also polished but the arms were modified. They became narrower for most of the length, the long central flute was narrowed, and they less resembled the mod. 93 arms.
Then the early 80s version, like that currently at auction, had the (ugly) square recesses forged into those short spyder arms.
The final variation was also anodized. It featured the "Saint Etienne crest" with the letter "S" on it -- in place of the name Stronglight actually spelled out. And eventually (finally!) they had even adopted modern 22mm dustcover/extractor threads.
Bob Hanson, Albuquerque, New Mexico, USA