This is from around 1999-2000 or so. I chose it after lots of research on TimeZone and Purists: JLC 889/2 based movement, 120 m WR, derived from the Gerald Genta designed original, magnetic shielding, and sized at 34 x 9 mm! I bought it from Marshall Pierce which is still around, although they've moved and gone through quite a few changes in the watch department.
IWC Ingenieur Ref. 3521