The Zenith El Primero Striking 10th reference 03.2041.4052/69.M2040 has a Stainless Steel case of 42.00mm, with a box-form sapphire crystal revealing the Silver dial. Inside ticks caliber El Primero 4052 B, which features a central seconds hand making one rotation every 10 seconds, and sub dials for 60 seconds (3:00), and 60 minutes (6:00).
