I just found that value on 2012 coin ( by the way, it was minted at SA Mint as You see on it, - request on modification sent already) is bold, and, as a result , - short distance from the "1"`s angle to fish tail.
Look at pic:
"10" is far from fishtail vs "10" is almost touches fishtail
Reverse:
PM vs SAM ( not considered as subtype, just note)
Short legend ( from the end of 3d part of left fish fin to the end of 3d part of right fish fin) vs large legend ( from the deep / almost the end of 4th part of left fish fin to the end of 4th part of right fish fin )
small dots from left and right of arms vs bold dots.