Big & Bold - two words that sum up The RocK rather well.Its specs will cause the faint-wristed among us the shiver: 21mm height, 44.8mm diameter (at the bezel), 52mm lug-to-lug and a 6mm thick sapphire crystal. Not one, but TWO helium escape valves - just because. The RocK is powered by an automatic ETA 2824 movement. The 'Yell' version of The RocK has a yellow dial and a yellow / black bezel insert.