The 2012 SIHH PuristSPro Live Report - Jon Z. (Z3) Greubel Forsey Speechless.... I will let the photos do the talking. GMT - Calibre GF05 in white gold case Quadruple Tourbillon Secret - for those discreet gents do not wish to have their quadruple tourbil...
THe one which caught my attention this year is their 24 seconds Tourbillion .... its my second favorite after the invention piece 1... i do see PROTO 1 engraved on the case back stating that its a prototype i believe ... any clue IF there are any changes ...