We are talking about the machine vended
stamps used with the wrong ink(blue).
The post office find out and correct the ink after it has been used three days long!
tonyjimmy
2002-05-01 17:45
We are talking about the ATM stamps with different, blue face-value, the normal one being black.
The Kungkuan post office near NTU noticed such mistake and replaced the ribbon three days later.