11990
These 19mm D20 olympic pearlized bronze die are numbered 1 to 20 - each side has a number etched into the surface and painted black. The top number displayed on a roll is the number used for that turn. The 6 and 9 are marked with a dot at the lower right of the number to avoid confusion between the two numbers.
Koplow Games Dice are some of the best in the hobby, with well painted and etched numbers/pips/text.