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Certina 28-15
Basic Information
| Name | Certina 28-15 |
|---|---|
| Manufacturer | Certina |
| Launch Year | 1955 |
| Caliber Family | Description 28-15: 18000 A/h 28-151: 18000 A/h, date 28-16: 19800 A/h 28-161: 19800 A/h, date 28-163: 19800 A/h, date, circadian rhythm Related calibers Certina 28-15, Certina 28-151, Certina 28-16, Certina 28-161, Certina 28-163 |
| Is COSC certified | No |
Timegrapher
Beat rate
18,000 bph
Frequency
2.5 Hz
Lift angle
48 degrees
Reference: healthy amplitude ≈ 270–315° fully wound (>200° at 24 h); beat error ideally < 0.5 ms.
Technical Details
| Lignes Dimensions | 12.5 ‴ |
|---|---|
| Dimensions | 28.4 mm |
| Height | 4.4 mm |
| Further Measures | Mounting Diameter (Dm): 28.0mm Stem height (T): 2.3mm Mounting Height (F): 1.3mm |
| Power Reserve | 46 hours |
| Frequency | 18,000 vph |
| Jewels | 17 |
| Lift Angle | 48 degrees |
Complications and Specifications
| Shape | Round |
|---|---|
| Complications |
|
| Shock Protection | Incabloc |
| Regulator Type | Pinned Regulator (or Index Regulator) |
| Movement Type | Manual |
| Escapement Type | Swiss Lever |
| Control Type | Balance Wheel |
| Winding Type | Stem Winding (Crown) |
| Setting Type | Stem Set (Crown Pull) |
Additional Information
| Hand Sizes | 1.50 x 0.90 x 0.18mm |
|---|---|
| Hand Count | 3 |
| Country Of Manufacture | Switzerland |
| Notes | Remarks: Girocap combined settings for escapement wheel after 1957 ring balance and mobile stud carrier Other data: balance staff: U2782 stem: W2805 mainspring / battery: 1.40 x 11.5 x 0.125 x 360mm Mainspring: 1.400 x 10.500 x 0.115 x 360.000 mm |
| Signature | 1-2) ca. 1955: Certina, 28-15, Swiss, 17 Jewels; Incabloc 3) 1957: Certina, 28-151, Swiss, 17 Jewels; Incabloc (Certina 28-151) |
| Import Codes |
|
Compatible Parts
376 other caliber(s) share compatible parts with this caliber.
50 compatible part(s) available — Supporter feature.
Metadata
| Created At | Sep 15, 2023 |
|---|---|
| Updated At | Apr 23, 2025, 11:31:22 PM |
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