Doctor House wore two models of watches:
1. Hamilton Khaki King. Classical automatic watch on the brown leather band:
2. Casio Pathfinder SPF40-1V. Multi-functional digital watch:
This is an old model, so you can find it only on secondary market, but you can get excellent modern titanium version instead: Casio Men’s PAG240T-7CR Pathfinder Triple Sensor Multi-Function Titanium Watch.