Lore currency

So i know that a golden kraken is presumably the highest form of currency in bilgewater. As well as that "gears" is commonly used in piltover (as i've half-assedly deduced through "the vastayan journal"). Now the question is if any of you have heard or read anything lore-wise that has been established as money in cities, Whether it be demacia or noxus or the bloody kumungu. Thanks
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