I exported your model and opened it with one or two other apps. It looked ok except for one missing face…the upper face on one side of the guard. When I looked at your blend file that face was also missing there. After building the face and re-exporting, all looked fine. What are you using to open the 3ds?
Please find attached fixed model, please test and let me know.
Only little things that I could find
1.Two missing faces
2.Four faces where they should not be. (In my opinion)
3.And also normals needed to be recalculated outside. (CTRL-N)
4.Retopo the end of pommel to make all quads.