The World Time PP5130 has a self winding movement with a twenty four hour night and day indication for the 24 time zones. It is water resistant up to 30 meters and has a case diameter of 39.5mm.
The Patek Philippe complications World Time is available in the following references:
PP5130J-001 Yellow gold with brown alligator leather strap
PP5130G-019 White gold with black alligator strap
PP5130R-018 Rose gold with alligator watchband
PP5130P-020 Platinum with blue alligator strap
PP5130R-011 All rose gold ( case and bracelet)