Seagull Ocean Star:

Except for the technical skills of the tourbillon, Seagull’s only relies on appearance. To be pragmatic, it doesn't have much content, it has a wide range of applications, it won't lose face, and it will be very accurate. It is also a waterproof sports watch; Seiko’s quality control is good, so choose Seiko.

Seiko SKX007:

One piece of Seiko SKX007 is equivalent to 71 pieces of SKX007. However, the 007 watch is too cost-effective and is not sold in China, so it is quite popular among major forums and diving watch enthusiast circles. . . . The movement is indeed not good, the functions are simple, it cannot stop the seconds and cannot be manually wound, but for something that costs over 1,000 yuan and can saturate dive to 200m, there is no need to be picky.

Seagull Watch:

A famous Chinese watch brand, which has been rated as a "Chinese Famous Brand" product and "China's Well-known Trademark" by the country. On March 24, 1955, China's first watch "May Day" brand watch was born in Tianjin. Later, Tianjin Watch Factory and Hong Kong Huacheng Watch Company jointly created China's first export watch (Seagull watch). The watch was born. "

SEIKO Watch:

It is a famous Japanese watch manufacturer. It was founded in 1881. The company was originally named Hattori Watch Shop. In 1892, it was renamed Seikosha. The founder was Hattori Kinko. Taro. In 1924, the first watch officially using the Seiko brand was released. In 1967, Switzerland invented the quartz watch. In 1969, Seiko launched the world's first commercially produced analog quartz watch - SEIKO ASTRON. /p>

Reference materials

Min Ying’s answer. Zhihu [cited on 2018-1-20]