Stephen -
There was a limited edition in 2004 or thereabouts:
Reference Cal. 99.2 (40) 950 PT, a limited series of 50 pieces worldwide. Same 99.2 movement as in standard model, with Platinum (950) case, matte finish Montego-Blue dial and pear shaped white hands. Black hand-stiched Louisiana Alligator strap with signed Platinum (950) tang buckle.
The montego blue dial, while not listed in the catalog, is still available upon request for many of the models, as is the Pt case (as you found).
regards, Tom