1977年香港艺术中心开幕纪念金银章2枚一套,金章纯度22K,重11.32克,附原盒,金章发行量2500枚,银章发行量5000枚。Hong Kong, lot of gold and silver medallion struck to commemorate the opening of The Hong Kong Arts Centre in 1977, the silver is sterling silver and the gold is 22k and weighs 11.32 grams,proof, the gold in its case of issue. Mintages of 2500 for the gold and 5000 for the silver (2)