IWC Portofino IW510103 See‑Through Case‑Back Watch

Case: 316L stainless steel
Dial: Small seconds sub‑dial, stop‑seconds function, baton markers, Roman numerals, power‑reserve decoration, PORTOFINO logo, date window, sword‑shaped hands
Crystal: Double‑sided anti‑reflective arched coated sapphire crystal
Strap: Italian calfskin leather
Movement: Self‑developed automatic mechanical movement