The blades on Yaka-swords can differ. I already saw many blades with similar shapes like the one you have. Mine are just a bit different (that's why I bought them
)
I think I already showed them, but here they are again.
The one on the left is atypical as it has the hilt of a Yaka-sword, but the blade of a Songye-sword. So is it Yaka or Songye, it's up to you. Blades travelled throughout Africa as currency, so anything can happen.
The 'normal' Yaka-sword (on the right) is quite a large piece. It measures about 70 cm ! It's heavy and well forged. Besides the dotted lines, there's also a zigzag design.
Unfortunately, I don't have scabbard for these pieces.
