Yesterday I was at Gerard’s place and he asked me if Speedmasters always were chronographs. I didn’t have to think long and said that I can’t remember seeing them. Then he showed me this Omega brochure from 1991 with a Speedmaster on the cover which wasn’t a chronograph. The referencenumber is definately Speedmaster, since it is in the 3000-series. The case-shape showed some similairities as well (notice the outside of the lugs). But that’s it.
No Speedmaster on the dial as well, but I was told that the caseback had ‘Speedmaster’ engraved.