The "San Wu" brand clock was born in the 1930s and 1940s. At that time, the most popular products on the market were imported clocks from Japan and Germany. Domestic clocks were not popular because of their rough production and poor quality.

In order to revitalize domestic products and boycott foreign products, Mao Shitang, the manager of the Dalun Silk and Cloth Factory who came to Shanghai to invest from Tianjin, and others came up with the idea of ????creating China's own famous brand clock. In 1940, the clocks produced by China Watch Manufacturing Factory officially started production at the Zhongcaiji Wooden Shell Factory located at No. 608 Xujiahui Road (now Zhaojiabang Road).

Most of the domestic clocks at that time could only run for seven consecutive days. Engineer Nguyen Soon Huat and factory technicians went through repeated trials and continuous improvements to create a birdcage gear and a shaft core with high smoothness to extend the travel time and service life. In this way, the clock can run continuously for 15 days. In order to highlight this performance feature, it was finally decided to use three "5"s as the product trademark and name it the "Sanwu" brand 15-day clock.

The "Sanwu" brand clock was very popular as soon as it came out, and quickly became the leader among my country's national industrial products. The factory also uses the overseas trade channels of China's domestic products associate companies to sell its products to various parts of Southeast Asia. Overseas Chinese are enthusiastic about purchasing, and foreign sales account for 80% of the total output.

The Chinese watch manufacturing factory also developed and expanded. In just one year, the number of employees increased from more than 40 when the factory was established to 120. Extended information

The background of the creation of the Sanwu brand clock

China Clock Factory was founded by Li Kangnian in 1947 with the support of Fang Yexian. When he was the general manager of China Clock Factory, he hired an engineer named Ruan to design and manufacture "Sanwu brand" wall clocks and table clocks with thin shafts, low friction, and a winding time of 15 days. This kind of clock uses a movable pendulum device, which can be set in reverse order. Even if the hanging pendulum is skewed, it can still keep running.

For this reason, Li Kangnian used two advertising slogans: "Although it hangs crookedly and keeps crooked, it will be accurate if you turn it backwards and forwards." This reflects the quality and fine production of Sanwu brand clocks. Therefore, after the Sanwu brand clock came out, it won high praise from the society and continues to maintain a best-selling momentum among similar products to this day.

Reference: Baidu Encyclopedia Shanghai Watch Factory