| Manufacturer | Sellita |
| Caliber Number | SW290-1 |
| Base Caliber | Sellita SW200-1 |
| Movement Type | Automatic, self-winding mechanical |
| Lignes | 11.5”’ |
| Diameter | 25.6mm |
| Height | 5.6mm |
| Jewel Count | 31 |
| Beat Rate / Frequency | 28,800 bph / 4 Hz |
| Lift Angle | 50 degrees |
| Power Reserve | 38 hours |
| Rotor Style | Ball-bearing |
| Rotor Winding Direction | Bi-directional (reverser style) |
| Hand-Windable? | Yes |
| Mainspring | Nivaflex |
| Anti-Shock Device | Novodiac or Incabloc (depends on grade) |
| Hand Count | 3 |
| Hand Sizes | 1.5mm / .90mm / .20mm |
| Functions | Central hours; central minutes; small seconds subdial at 9:00; date at 3:00 |
| Hacking Seconds? | Yes |
| Quickset Date? | Yes |
| Country of Manufacture | Switzerland, Swiss made |
| Known Models | Aquastar Deepstar II (Add your watch to the comments below…) |
The Sellita caliber SW290-1 is a Swiss made automatic movement with a small seconds complication at 9:00.
This calibre is based on the SW200-1. Many parts are interchangeable between the two movements, but not all, due to the small second configuration. For customizing purposes, and SW200-1 dial can be used, but a hole will need to be drilled for the small seconds hand. The hour and minute hands from an SW200-1 can be used, but not the seconds hand.
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