on the economist 1988 magazine, what is the circle in the center of the coin?

[frankbitcoin]

I think someone mentioned what it symbolized or meant before, but I can't remember.  Searched for it online and can't figure it out (referring to the circle with the line through it on the coin, on the Economist "Get Ready For a One World Currency" 1988 magazine).  Anybody know?

[minerjones]

The coin does read "Ten Phoenix", so maybe the circle with the line through it is just the symbol for Phoenix coin?

[markinaz]

This video claims it's Stellar Lumens... lol:

https://www.youtube.com/watch?v=wzqhgrbOg8Y

It does have an interesting review of the article though...