| Zenith Watch Index | Internet Wristwatch Index | How to regulate mechanical watches |
| plt = platinum, y = yellow, p = pink, w = white, PR = Open, size = Diameter (mm), thickness = height |
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| Case | Bracelet | Dial | Diameter (mm) | Calibre | Model Number |
| black titanium | Steel / composite | Black & silver | 46.5 | EL PRIMERO 4021 SX | 96.0525.4021/21.M525 |
| black titanium | black rubber | Black & silver | 46.5 | EL PRIMERO 4021 SX | 96.0525.4021/21.R642 |
| black titanium | black leather | Black & silver | 46.5 | EL PRIMERO 4021 SX | 96.0525.4021/21.C648 |
| Zenith Watch Index | Internet Wristwatch Index | How to regulate mechanical watches |
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