HEAVENLY STEMS AND EARTHLY BRANCHES - CHINESE CALENDARS - 2020. Third coin of a the series illustrating Ancient Calendars in Ultra High Relief. The second coin is the Chinese Calendar. Coins comes with a certificate of authenticity from the Mint of Poland presented in a prestige wooden box with a custom sleeve. Metal: 999 Fine Silver Finish: Antique Finish Diameter: 45 mm Features: Ultra High Relief Denomination.NZD Year of Issue: 2019 Mintage: 500 Weight: 2 Troy oz.