The futuristic watch, created by the Volkswagen Design team, launched last year limited to 2,012 pieces.
Now the Swiss brand have revealed two additional models, boasting white dials, a polished steel case, and a choice of either white or black rubber straps.
Inside the watches are Swiss ETA Valjoux 7750 automatic movements, delivering 28,800 semi-vibrations per hour.
Other features include sapphire crystal anti-reflective on both sides, and a pusher protection screw-down steel circumstance back.
Fortis were founded in Grenchen, Switzerland by Walter Vogt in 1912. In 1926 the company launched the worlds first self winding wristwatch – the legendary Harwood.