Although I have no photographic evidence, it looks like the first FORTIS watches worn on EVA - spacewalks were the chronographs worn by the Soyuz TM-19 cosmonauts Talgat Musabayev and Yuri Malenchenko (Mir-16 crew)
In summary: watches exposed to open space:
Omega Speedmaster 1965, June 3 by Edward White (2x Speedmaster 105.003-64)
Glycine Airman 1966, September 13 by Pete Conrad sat in open Gemini XI capsule during Gordon's EVA
Bulova chronograph 1971, August 2 by David Scott Apollo 15 lunar EVA 3
Fortis Cosmonaut 1994, September 9 by Mir-16 cosmonauts Talgat Musabayev & Yuri Malenchenko
FIYTA chronograph 2008, September 27 by Zhai Zhigang chinese taikonaut
SEIKO SpaceWalk spring drive 2008, December 23 by Yuri Lonchakov (2x SEIKO SpaceWalk watches)
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