| Manufacturer | Shanghai Watch Factory (上海) |
| Caliber Number | A611, A-611, A611A |
| Jewels | 17 |
| Beats per hour | 18,000 vph |
| Power Reserve | 40 hours |
| Anti-Shock System | None |
| Hand-Windable? | Yes |
| Hacking Seconds? | Yes |
| Functions | Hours, minutes, central seconds |
| Country of Manufacture | China |
| Known Models |
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The Shanghai caliber A611 is a 17 jewels (17 zuan) manual wind mechanical movement. It is based on the Shanghai caliber A581. This caliber was produced from circa 1961 – 1967.
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