One of the guardless sub types from Sumatra, the others that utilize this guard are not on this PC, will see if I can find some examples.
A personally feel this entire piece of yours is a WWII + period weapon from Murat Sabah... guard a personal thing... the same elegant guard style can be seen on some of the rarer Sumatra Silat weapons and also in Vietnam... but they are typically attached to the pommel too, although examples can be found with the floating guard.
https://www.thestar.com.my/lifestyle...machete-making