Axe or helebard?

[Victrix]

I think it looks like a Croatian battle axe. They are something in between bardiche and axe and most likely extremely formidable weapons. You can google examples online. There are also halberd versions that I saw in Trakoscan and Varazdin castles. Interestingly your item seems to have a makerÂ’s mark and remains of gilt/brass inlays. The latter means itÂ’s not munitions grade but probably used by an officer. Your item has a rectangular socket so more likely an axe?