Double sword (tamgha of Qaidu), date (687 AH / 1288 CE). 22mm, 1.85 grams. Samarqand mint. cf. Zeno 273710.

Kaidu was a grandson of the Mongol khagan Ögedei (1185–1241) and thus leader of the House of Ögedei and the de facto khan of the Chagatai Khanate, a division of the Mongol Empire. He ruled parts of modern-day Xinjiang and Central Asia during the 13th century, and actively opposed his uncle, Kublai, who established the Yuan dynasty.