These do look like from Pakistan. There is a story (no idea how true) that goes around about expertise of some of these mechanics that one of the nuclear scient

These do look like from Pakistan. There is a story (no idea how true) that goes around about expertise of some of these mechanics that one of the nuclear scientists (Abdul Qadeer probably) needed a cylinder part but the manufacturing plant wasn't getting it right. He eventually hired one of these expert local mechanics to make it for him and that guy made it perfectly for him.