both watches put the minute and seconds hash-marks with an tilted inner-bezel, diameter 41.5mm, most of them being century-old, sapphire case-back 100m water resistance Case: https://www.irichardmille.co https://www.iwcreplica.co 45mm diameter - titanium case with brushed ceramic bezel - sapphire crystal on front and caseback 30m water resistant Case: wigs online darylelena.com 45mm diameter - Titanium and ceramic with rubber inserts - rocker push-buttons back with opening in tinted sapphire crystal, with a brand new movement, but we felt that they worked better with the tourbillon model. Stainless steel and solid gold might be obvious choices for a watch like this.