| Type | Timekeeping mechanism |
| Impacts | Astronomy improvements • Navigation advancements • Cartography precision • Scientific calculations catalyst • Computer development |
| Variations | |
| Advancements | Improved timekeeping accuracy • Inventive Age innovations • Scientific and industrial development driver |
| Era of origin | |
| Main components | Gears • Springs • Wheels • Levers • Shafts |
| Place of origin |
