Parmigiani has released a new steel version of their Toric Hemispheres Retrograde with a lovely guilloché blue dial. Classic proportions of the 42.8 mm case are retained with the case knurling and the guilloché dial still done by hand. The very fair sized...
Patek Caliber 240 which does duty in most of their perpetual calendars including the sky-moon tourbillon is a petite ø 27.50mm. Caliber 324 doing duty in Patek aannual calendars is ø 27mm Cheers