Patek Philippe Nautilus 5990/1A-011 Stainless Steel

Sunburst blue with black-gradient rim, horizontally embossed, gold applied hour markers with luminescent coating.
Steel.
Case diameter (10 – 4 o’clock): 40.5 mm. Height: 12.53 mm.
Water-resistant :yes.
Screw-down crown.
Sapphire crystal case back.
Steel. Patented fold-over clasp with lockable adjustment system.