My first Dha ....a few questions please

[katana]

Hi
very pleased to have added a Dha to my collection .

The blade is approx 7mm thick distally tapering to approx 1.5 mm. Blade is 20" long. Has a fuller with scroll work at either end (no pics ...I haven't received it yet). I noticed later, whilst 'messing around' (contrast, brightness etc) with the pictures of the blade that there seems to be 3 brass/copper coloured inserts near to the 'tip'....please what is the significance of this

The wooden handle is bound with plaited grass/rattan .... no scabbard, but seems to be a good honest, functional Dha.

The seller stated that this was a 'bring back' and had been in the family for some 60 years and was told it was a 'head hunting' sword.

Could anyone help ID country of origin, possible age etc. ? Thank you kindly

Regards David

ps The sword blade may look a little 'odd' as it was photographed on a bath towel.