The cards were collected by a German IT-Engineer who was working in Asia in the 1980s and 1990s.
Some cards look new, some look used. I don't have a testing device to figure out whether there's still credit on the cards.
You can watch the whole collection on the pictures below.
The binder is used an a bit damaged on the lower back edge (see photo).
Please scroll to the very right and very bottom.
