From @paschka's ACsearch links, especially the 3rd link, I'm guessing that "Aten" is related to "Atenea", which seems to be the Spanish word for "Athena". I'm guessing, that @paschka is asking for help, to attribute the coin, and he thinks, that the head on the obverse, may be the head of Athena. Unfortunately, I am not familiar with these types of coins, and I have no idea, what the coin attribution is.
To my old eyes, it looks like a helmeted head of Athena, right, on the obverse and a horse with lowered head, right, as on coins of Larissa, OR a she-wolf right, with her head lowered and looking back left at, possibly, Romulus and Remus suckling. Really rough. Good luck.
Here's the one in my numophylacium. Macedonia, Pella, 187-131 BCE. AE 17.5 mm, 4.99 g. Obv: Helmeted head of Athena Parthenos, r. Rev: ΠΕΛ-ΛΗΣ, bull grazing r. Monograms below and above. Sear 1446; SNG Cop 266 ff; SNG ANS 598-617; BMC 5.91,17 ff; Moushmov 6453; Similar to Lindgren II 1103.
The word has a nice antiquarian feel to it, doesn't it? Makes me feel like an 18th century numismatist, studying my coins by lamplight after spending the afternoon at a garden party where a string quartet performed the latest piece by Haydn.
