CHINA - Forbidden City, set of silver 10 yuan 1997 proof in wooden case

Each of the five 10 yuan 1997 coins has the following parameters:

Material: Ag 999/1000
Weight: 31.1 g
Diameter: 40 mm
Quality: proof
Mint: Shenzhen Guobao
Circulation: 80,000 pieces of numbered sets
Set number: 20 652
The medal weighs 113 g of silver with a purity of Ag 999/1000.
The total weight of the silver is 268.5 g.
The wooden case has the following dimensions: 33 x 25 x 5 cm