![ROLEX OSCILLATING WEIGHT ROTOR 4030 ZENITH EL PRIMERO COSMOGRAPH DAYTONA 16520,16519,16509,16528,16523 WATCHES ROLEX OSCILLATING WEIGHT ROTOR 4030 ZENITH EL PRIMERO COSMOGRAPH DAYTONA 16520,16519,16509,16528,16523 WATCHES](https://www.chrono-shop.net/156395/copy-of-rolex-oscillating-weight-rotor-4030-zenith-el-primero-cosmograph-daytona-16520-16528-16523-watches-new-old-stock.jpg)
ROLEX OSCILLATING WEIGHT ROTOR 4030 ZENITH EL PRIMERO COSMOGRAPH DAYTONA 16520,16519,16509,16528,16523 WATCHES
![In-Depth: A Vintage Watch Nerd's Critical Dissection Of The Rolex Daytona, Past To Present (Part 2/3) - Hodinkee In-Depth: A Vintage Watch Nerd's Critical Dissection Of The Rolex Daytona, Past To Present (Part 2/3) - Hodinkee](https://cdn.hodinkee.com/uploads/block/inline_image/content_image/10756/044.jpg)
In-Depth: A Vintage Watch Nerd's Critical Dissection Of The Rolex Daytona, Past To Present (Part 2/3) - Hodinkee
This is the base movement of Rolex calibre 4030. I will do some initial timekeeping test on a timing machine before assembling the chronograph... | By Michael Woods - Watch Repair & Restoration | Facebook
![ROLEX OSCILLATING WEIGHT ROTOR 4030 ZENITH EL PRIMERO COSMOGRAPH DAYTONA 16520, 16528, 16523 WATCHES NEW OLD STOCK ROLEX OSCILLATING WEIGHT ROTOR 4030 ZENITH EL PRIMERO COSMOGRAPH DAYTONA 16520, 16528, 16523 WATCHES NEW OLD STOCK](https://www.chrono-shop.net/100600/rolex-oscillating-weight-rotor-4030-zenith-el-primero-cosmograph-daytona-16520-16528-16523-new-old-stock.jpg)