Do you have a source that explicitly says they're seals and not gil? The mottos and leaders images alone I don't personally think are enough to cement them as seals. The GCs have become so intertwined with the cities now that their mottos are practically the motto of the city-state itself.I can't seem to find the original page of where that pic came from, so I don't know offhand what text accompanied it.(Nvm, found it, see below) The text for commemorative coin, while separate (but perhaps related, only speculation there), does specifically say it's a gil piece and that the GCs were the ones to mint it, so they do have the administrative power to do so.
Would be awesome though if you (or someone else) could find that other image you mention though, and any paired text would be a bonus.
Found the text for my image of the GC themed coins:
http://lodestone.finalfantasyxiv.com...9fb72099b16dbf
The bit I bolded sounds like it has more to do with general economy (gil) than anything GC specific, and that's where the image appears. Still far from conclusive though, I admit. I'd just personally lean to them more likely being gil than seals.Originally Posted by Lodestone
I'll note I'm not trying to say ALL gil would carry those 3 designs since they'd clearly be special runs, but that the symbol we see in game next to the gil we own is probably a generic one.