Early (Vintage) flat pack chair found in Africa

I have found 6 chairs in an old store room in Zambia Africa which look to be early flat pack furniture items and want to find out where they came from and what age they are.
They are well made from hardwood (possibly teak) with old recessed allen keys holding cross members together and the seat and back are thick leather with brass buckles.
There is also a similar looking table so maybe this was a dining set?

Any information would be welcome?

many thanks,

ross