Dice from the game Lien Poh, consisting of a Poh (=die) and a Poh Kam (=metal container in 2 parts, not on the picture).|
The game is played with one Poh, having the same markings on each side!!!
After putting the Poh in the Poh Kam, the Poh Kam is closed and spun around.
Then the Poh Kam is opened and the randomising element is given by the orientation of the Poh in the Poh Kam.