In the previous model, the tourbillon was highlighted against a background decorated with Geneva stripes
. In the new IWC Portuguese Tourbillon Mystere Retrogradeit is set into the inner surface of a highly polished ring, in which the filigree parts of the tourbillon are reflected. For apart its technical sophistication, an escapement like this is also a feast for the eyes from the back, too, thanks to the see-through sapphire glass cover. The 500 Limited Edition watches in red gold have solid gold appliques on the silver-plated dial, while the red gold-plated feuille hands typical of the Portuguese show the time. The edition of 250 Limited Editon watches in platinum features a discreet, grey dial with rhodium- plated hands and appliqued indices. Both watches are supplied with leather straps and an IWC folding clasp in either red gold or platinum, with an inlaid red gold medallion bearing the Probus Scafusia stamp.