年份：約1960年代
工序：生茶
茶廠：昆明茶廠
倉儲：自然倉
數量：七片
總重量：約309g, 305g, 306g, 315g, 317g, 316g, 322g
This lot is well-preserved in original packaging. The cakes are tightly compressed with flat bases and parallel nail-like marks on the back. The blend is similar to that of the Blue Mark Iron Pu-er, displaying rich texture and strong flavour, making it a renowned product of Kunming Tea Factory. Kunming had the most advanced techniques and tea artisans during its production, making this lot both a successor to Yin Grade Pu-er and the pioneer of Iron Pu-er.