Steel
22mm x 30mm 18K yellow gold case, 6mm thick, octagonal crown with a blue sapphire,...
25.20mm x 20.30mm steel case with 24 brilliant-cut diamonds totalling 0.49 carats, 6.15mm thick, faceted...
30mm x 25.05mm steel case with 26 brilliant-cut diamonds totalling 0.62 carats, 6.65mm thick, faceted...