This watch is also known as:
03.0526.4021/21M , 03052640 , 03.0526.4021.21.M526 .
The Zenith El Primero Open Model #03.0526.4021.21M features black dial with Arabic numeral and index hour markers, 30-minute counter at 3 o'clock position, power reserve indicator at 6 o'clock position, and open dial showing the escapement mechanism at 10 o'clock position. The 46.5-mm stainless steel case is protected by a scratch-resistant sapphire crystal. A brushed stainless steel bracelet completes the stylish look of the Zenith El Primero Open 03.0526.4021.21M. This automatic men's watch is water resistant to 50 meters (165 feet) which makes it suitable for showering or swimming in shallow water.