Diameter: 39.5mm excluding crown
Thickness: 10mm / Lug width: 21mm
Weight: 78 grams
Movement: Sea-Gull 818.904 tourbillon
Crystal: sapphire
Color of hour and minute hands: blue
Color of Roman numeral hours: black
Color of dial: gray white
Band material: genuine leather with butterfly deployment
Unique features: retrograde date at left side, retrograde weekday at right side, tourbillon mechanism above 6 o'clock. The overall layout is similar to M171S. While M171S is automatic, this tourbillon watch is manual hand-wound, and made thin only 10mm thick.
