- Many watch brands test their timepieces to extremes of depth, temperature and pressure
- Extreme testing results in many watches exceeding the needs of the wearer
- Some tests, like the 'sheep's foot' -- a big steel hammer -- are still very crude
This is part of a series dedicated to Baselworld 2016. Josh Sims is a freelance writer, watch expert and author of "Icons of Style".
(CNN)Deep within Rolex's landmark Geneva HQ is a 1.3 tonne lump of stainless steel. Somewhat unprepossessing from the outside, inside is a hostile microcosm.