This comprehensive reference guide is designed as a technical lookup for Rolex movements and their corresponding models. It tracks the genealogy of Rolex calibres from the early in-house foundations to the high-frequency innovations of 2025/2026.
Calibre Identifier
Quick Technical Lookup
Enter a Rolex calibre reference (e.g., 3135, 3235, 4130, 9001) to instantly view its technical specifications and history.
Calibre Reference
Base Specs
Primary Models
I. Mainline Time and Date Movements
| Calibre | Year | Base Specs | Key Improvements | Primary Models |
|---|---|---|---|---|
| 1030 | 1950 | 25J / 42h / 18,000 | First fully in-house bidirectional rotor | Explorer 6610, Submariner 6536/6538 |
| 1530 | 1957 | 25J / 42h / 18,000 | Transition to 1500 architecture | Air-King 5500, Submariner 5512/5513 |
| 1570 | 1965 | 26J / 42h / 19,800 | Introduction of hacking seconds (post-1970) | Datejust 1601, GMT-Master 1675 |
| 3035 | 1977 | 27J / 42h / 28,800 | High-beat frequency; Quick-set date | Datejust 16000, Sea-Dweller 16660 |
| 3135 | 1988 | 31J / 48h / 28,800 | Full balance bridge; Larger balance wheel | Submariner 16610, Datejust 116234 |
| 3235 | 2015 | 31J / 70h / 28,800 | Chronergy escapement; Optimized barrel | Submariner 126610, Sea-Dweller 126600 |
II. Chronograph and Specialty Movements
| Calibre | Year | Base Specs | Key Improvements | Primary Models |
|---|---|---|---|---|
| 727 | 1969 | 17J / 48h / 21,600 | Manual wind; Valjoux base heavily modified | Daytona 6263/6265 |
| 4030 | 1988 | 31J / 54h / 28,800 | Zenith El Primero base modified; Removed date | Daytona 16520 |
| 4130 | 2000 | 44J / 72h / 28,800 | In-house integrated vertical clutch; Parachrom hairspring | Daytona 116520 / 116500LN |
| 4131 | 2023 | 44J / 72h / 28,800 | Reduced components; Côte de Genève decoration | Daytona 126500LN / 126506 |
| 9001 | 2012 | 40J / 72h / 28,800 | Annual calendar; Dual time zone | Sky-Dweller 326934 |
"The trajectory from the early Aegler calibres to the contemporary 32xx series reveals a consistent philosophy: the movement is the silent, efficient heart of a tool designed to operate under any environmental extreme."
