Three items to identify

[Miguel]

Hi Everyone

I would appreciate your help in identifying the following weapons as I have been trying, unsuccessfully for what seems like ages.
The first is what appears to be a fighting knife. It is well made with a curved, single edged blade, having a fuller on each side just below the back edge. It has a steel knuckle guard with simple line, geometric decoratin. the handle comprises wood and alloy scales attached to the tang.
the scabbard is of leather covered wood with a steel chape and brass band near the throat. the band has the same decoration as the knuckle guard. The guard is attached to the pommel by peening over the tang. There is just something about it that makes me think it is home made. The overall length is 18 ins with a blade length of13.25 ins and width of 1.375 ins.

The second item I think is African and comprises of a steel pipe covered in leather work to enclose the blade which is made from a 0.375 ins dia rod squared off for the final 9 ins at the point. The handle is wood covered with leather. Overall length is 30 ins with blade length of 21.5 ins.

The final item could be Indian ? I have exhausted all my references and cannot locate anything on the web. Incidentally the final item is all steel with no decoration. Overall length is 23.5 ins with a blade length of 18.5 ins and width of 1.5 ins. The scabbard is wood with a steel chape but I do not think it is the original. Your comments would be appreciated.
Miguel