is it possible to date unmarked brit machettes and sheaths?

[ILH]

Hi, I have a bunch of british/indian machettes and would like to date the one in the middle of the photo.... is this possible?

Those on the left have war time dates on the sheaths and the cut-down Colins machettes.
Those on the right are post war marked.

The machette in the middle, with the brown handle, is unmarked and the sheath it came with is heavily repaired and marked "HSS30"

thanks, Jim.