Sowind 99201 in-house manufactured manual-winding mechanical movement Calibre 12 1/4''', 22 jewels, frequency 21.600 vib./hour (3 Hz) 72 hours minimum power reserve Tourbillon at 6 o’clock, linear power reserve indicator at 10 o'clock Brushed 18k white gold case, dimensions 36.30 x 36.30 mm, height 11.92 mm Curved, anti-reflective sapphire crystal "Côtes de genève" decorated case-back, fastened with 4 screws Water-resistant to 30 m Mat galvanic black dial, applied "Côtes de Genève" decorated subdial Rubber coated square-scale full skin hand stitched alligator strap with 18k white gold folding buckle