Zodiac SST Astrographic 

Ref. 883 953 | Cal. Zodiac 88D  Automatic | 21 jewels | Diameter 40mm

This 'Mystery Dial' Zodiac was first introduced in 1969 as SST Astrographic. It was available in two case styles, round and square. Their unique selling points were the floating batons for hours and minutes and the red dot as sweep seconds hand. Very 70's. The floating hands were created by the use of 3 transparent discs. Some sort of extraterrestrial experience.