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Brand: | Sinn | 
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|---|---|---|---|
| Family: | |||
| Height: | 4.50 mm | ||
| Jewels: | 17 | ||
| Reserve: | 46 hours | ||
| Frequency: | 18,000 A/h | ||
| Winding: | Hand winding | ||
| Diameter: | 36.60 mm (16.5 ligne) | ||
| Complications: | Hacking Seconds, Regulator | ||
| Hands: | Central Minute Hand, Hour Hand at 12:00, Small Seconds Hand at 6:00 | ||
| Distinguishing Technical Characteristics | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
 Hand-Winding  Clockwise Balance Cock  Etachron Regulator |
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| Production: 2006 – 2024 | |||||||||||
| 1910s | 1920s | 1930s | 1940s | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
Cal. SZ04 is an “in-house” movement produced by Sinn based on the ETA Cal. 6498-1. It moves the hour hand to a subdial at 12:00, creating a regulator design on the “hunter” watch movement and adds a hacking seconds device.
Sinn introduced Cal. SZ04 in 2006 for the 6100 “Classic” line, which continued through 2024 and appears to be quietly retired in 2025.
Note that this movement is based on the 18,000 A/h ETA 6498-1, not the 21,600 A/h ETA 6498-2 that came out a year earlier.
Images are taken from official publications and are used here for commentary and educational purposes. Copyright is held by the original owner as noted.