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ETA 2790-1
Basic Information
| Name | ETA 2790-1 |
|---|---|
| Manufacturer | ETA |
| Launch Year | 1976 |
| Caliber Family | Description manual / automatic respectively 21600 A/h: 2750 / 2770, 2776: no date 2752 / 2772: date 2753 / 2773: date, precision regulator 2758 / 2778: day, date 2759 / 2779: day, date, precision regulator 2761 / 2781: quick set date, high 2762 / 2782: quick set date 2763 / 2783: quick set date 2763-F6 / 2783-F6: quick set date, digital 2768 / 2788: day, quick set date 2769 / 2789: quick set day and date 2769-1 / 2789-1: quick set day and date, double-language 28800 A/h: 2751 / 2771: no date 2754 / 2774: date 2760 / 2780: day, date 2764 / 2784: quick set date - / 2790 : quick set day and date - / 2790-1: quick set day and date, double-language - / 2791: quick set date, high Related calibers ETA 2750, ETA 2751, ETA 2752, ETA 2753, ETA 2754, ETA 2758, ETA 2759, ETA 2760, ETA 2761, ETA 2762, ETA 2763, ETA 2763-F6, ETA 2764, ETA 2768, ETA 2769, ETA 2769-1, ETA 2770, ETA 2771, ETA 2772, ETA 2773, ETA 2774, ETA 2776, ETA 2778, ETA 2779, ETA 2780, ETA 2781, ETA 2782, ETA 2783, ETA 2783-F6, ETA 2784, ETA 2788, ETA 2789, ETA 2789-1, ETA 2790, ETA 2790-1, ETA 2791 |
| Is COSC certified | No |
Timegrapher
Beat rate
28,800 bph
Frequency
4 Hz
Reference: healthy amplitude ≈ 270–315° fully wound (>200° at 24 h); beat error ideally < 0.5 ms.
Technical Details
| Lignes Dimensions | 11.5 ‴ |
|---|---|
| Dimensions | 26 mm |
| Height | 5.9 mm |
| Further Measures | Mounting Diameter (Dm): 25.6mm Dial Spacer: 0.1mm Stem height (T): 2.6mm Mounting Height (F): 2.05mm |
| Power Reserve | 45 hours |
| Frequency | 28,800 vph |
| Jewels | 25 |
Complications and Specifications
| Shape | Round |
|---|---|
| Complications |
|
| Shock Protection | Incabloc |
| Regulator Type | Pinned Regulator (or Index Regulator) |
| Movement Type | Automatic |
| Rotor Type | Central Rotor |
| Escapement Type | Swiss Lever |
| Control Type | Balance Wheel |
| Winding Type | Automatic (Rotor-Driven) |
| Setting Type | Stem Set (Crown Pull) |
Additional Information
| Hand Sizes | 1.50 x 0.90 x 0.25mm |
|---|---|
| Hand Count | 3 |
| Country Of Manufacture | Switzerland |
| Notes | Remarks: 1976-1980, ca. 1033700 like 2790, but double-language day display Other data: balance staff: U3531 stem: W3394 mainspring / battery: 1.45 x 10.5 x 0.13 x 380mm |
| Signature | 1) ca. 1976: Felca Rotomatic, Swiss Made, 25 Jewels; Incabloc 2) 1982: Orfina Watch Ltd, Swiss Made, 25 Jewels; Incabloc |
Compatible Parts
180 other caliber(s) share compatible parts with this caliber.
88 compatible part(s) available — Supporter feature.
Metadata
| Created At | Sep 15, 2023 |
|---|---|
| Updated At | Apr 23, 2025, 11:32:11 PM |
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