天文台认证cosc是controle officiel suisse des chronometres（瑞士官方天文台检测机构）的缩写。此外在2001年，cosc的三个实验室日内瓦、比恩、乐洛可个别测试了1315752只钟表机芯，大多数符合国际天文台机械机芯标准ISO3156，并且颁发了1255515张天文台认证证书，价值至少450万美元。比去年增长23.3%。
最终质量检测可确保每一台机芯的运行参数完全符合瑞士官方天文台认证中心(COSC)的严苛要求。
The final quality control guarantees that the operational parameters of each movement comply with the requirements of the Swiss Official Chronometer Testing Institute (COSC).
为确保瑞士官方天文台认证（COSC）的仪器能可靠地检视每个机芯，所有机芯必须配置白色表盘和黑色秒针。
To guarantee absolutely reliable read-off by COSC instruments, all movements must be presented with a white working dial and a black seconds hand.
我们的每一块手表都是经过认证的天文台表；我们对产品的质量信心十足，是少数几家能够提供三年保质期的手表厂家之一。
Every watch we make is Chronometer certified and we stand by our product and are one of the few companies offering a three year warranty on every watch we produce.
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