Omega, Zhongshan watch.

1. Omega watch. In 1848, Omega was born in La Chaux-de-Fonds, northwest Switzerland. Its founder, Louis Brandt, took its English name OMEGA, named after the Greek letter "Ω".

2. Zhongshan watch. In the 1980s, a Zhongshan watch cost 30 yuan. Zhongshan watches were produced by the Nanjing Watch Factory. Its predecessor was the public-private joint venture Jiangnan Clock Factory, which was renamed Nanjing Zijinshan Watch Factory.