It taste Indian to me too by the looks of it, but I'd rather go African since India is more known for spares of already existing stoves. Perhaps Rhodesia (Nowadays known as Zimbabwe), but more likely ZAR.
Congratulaions! @Christer Carlsson got it right and @z1ulike provided a link. Best Regards, Kerophile.
Filler cap looks like Apex Primus by APEX? But burner cap on Mystery stove look cast rather than pressed manufacture. Best Regards, Kerophile.
Just for info - APEX, made by JPM (Johannesburg Metal Pressings) were taken over by CADAC (Commercial And Domestic Appliance Corporation) in the 1970's
Cadac is what came to my mind as well. A friend has one, lower quality possibly, but a right runner. He loves it.