A silver Tanka, Kashan mint, dated 822AH/1419AD, 5.1g, 21mm. A silver Tanka, Qum mint, dated 828AH/1425AD, 4.9g, 20mm. A silver Tanka, Qum mint, dated 829AH/1426AD, 4.9g, 21mm. A silver Tanka, Kashan mint, not dated, 5.1g, 22mm A silver Tanka, Qum mint, not dated, 4.4g,18mm.