I've got this super small but nicely detailled Celtic coin: Weight: 0.48g, diameter 11 - 14 mm, depending on the axis. The observe shows a (helmeted?) head; the reverse a galloping horseman. Any help is very much appreciated.
This is not a match but does look of a similar style... https://www.vcoins.com/en/stores/ca...to_60_bc__silver_18_stater/71063/Default.aspx
I think I found 'm! Note sure whether it's allowed to post prt screens of Asearch (if not, I'll remove it), but here it is: