| Brand | Rado |
| Caliber Number | 657 |
| Base Caliber | ETA 2899 (2899-S2) |
| Movement Type | Automatic, self-winding mechanical |
| Jewels | 21 |
| Lignes | 11 1/2”’ |
| Power Reserve | ~42 hours |
| Beat Rate | 28,800 (4 Hz) |
| Anti-Shock System | Incabloc |
| Rotor Style | Ball bearing system |
| Hacking Seconds? | Yes |
| Hand Count | 3 |
| Features | Offset hours and minutes dial; offset running small seconds subdial at 9:00, date at 9:00 |
| Country of Manufacture | Switzerland, Swiss made |
| Known Models | Rado Diamaster Grande Seconde (Please add your watch in the comments below…) |
What is often referred to as the Rado caliber 657 is actually an ETA caliber 2899. Click here for the ETA 2899 caliber listing.
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