Gladius question

[Crispvs]

The only grip I can think of which is even close to that shape is the ivory one from Caernarfon/Segontium. The vast majority of actual first century AD sword grips are either octagonal or hexagonal in section and in profile feature four depressions on each face, which are crescent shaped and meet edge to edge, forming ridges between them.
Here is a sword from Mainz (with an interesting triangular blade which I don't think anyone had been brave enough to do a reproduction of yet) which still retains its complete bone handle. You can see the shape of the grip quite clearly.



Here is another bone handle assemblage from Dorchester. Note the form of the grip on this example too.



Here is the handle I made for my sword, copying examples from Vindonissa.




Crispvs