First mechanical clock

According to Official Guinness Records,

The earliest mechanical clock, i.e. one with an escapement, was completed in China in AD 725 by Yi Xing and Liang Lingzan. Information from Archives (e.e. 1994). Submitted for use in Scholastic's Modern Marvels.

For a complete list of Unknown date records, please visit Unknown date Guinness Records in China.

Related Images

Other China records that might interest you:

• Highest observation deck
• Most gender specific language
• Busiest railway network for freight (country)
• Highest dam
• Highest railway bridge