There are 10 countries represented...

Australia, Brazil, China, France, Germany, Italy, Japan, Spain, USA & Great Britain.


Pin 1322 (pictured above) 

Pin 1389 (pictured left)

Pin 1499 (pictured right)

Based on the pin numbers and the size of the gaps, it seems that there are a lot more countries to come and it seems that the Great Britain pin number is higher than the USA pin number, so perhaps they are in the order off the Athletes' Parade at the Opening Ceremony?

The issue size for these 10 pins is 10,000 pieces.