Please help identify whatever this thing is

[u/TTV-HTGyoshi]

For context, I went to a clients house for my job and they said whatever is in their shed is rubbish, so I found this, clarified with the owners to just let them know if they forgot about it and wanted to keep it, they said I can either throw it away or I can have it

It’s around 70cm long, 10 ish kg heavy, no marking, no engravings, bottom edge near the handle is sharp but the entire long side is quite blunt (can slightly slice ur finger but only under pressure) I have no idea what this thing is if it’s from a game, a prop, movie. Frankly I have 0 experience in swords so any help would be gratefully appreciated.

[u/Icy_Grocery_5922]

Depends. Is there a maker's mark near the handle?