We have six sets of these (sets of two...one for either arm) ...all are different...I would think that they are probably over all 40 - 50 years old but hard to tell as items age quickly in the tropical humidity of Papua New Guinea. Certainly they all show age and wear and smell of woodsmoke and dirt. Genuine hard to replace items.
At Molloy's of Milford Antiques Centre, Auckland, New Zealand
Specialists in Pacific Islands Items, Victoriana, And a Fascinating Range of General Collectibles