I do have a special coin which I think is from A&H but the 2 sides are too similar and it isn't immediately clear which is which.
The SG1/FIFA assistant referee who ran the line to me in the extra preliminary round replay of The FA Cup (yes, pick that f*cker up) advised me to get a better coin, because you don't want the lasting impression with captains to be one of indecision over which side the coin actually landed on.
I stopped using that one immediately, but have only just ordered a better 'special coin' off the internet, which this conversation prompted me to order.