There's a second and final unique De Bethune watch inside the Phillips link catalog. Also coming from David Zanetta's personal watch collection lot 136 in the sale is a one-of-a-kind prototype of the DB25 in 18k rose gold from 2007. Unlike production examples of the link DB25 Zanetta's prototype watch has an unexpected complication in the form of a spherical power reserve display at 12 o'clock on link the dial.