Dr. Ir. (Achmed) Soekarno, rubber plantation

6 digit serial # with 2 capital Block letters (e.g. 605980 UV)

For this note the following "Huisman Table" for fixed relation between serial # and Block letters is applicable:

The first number of the serial # of this note is "6". So the only possible 1st Block letter is "U"
This note has the number 605980 UV

Conclusion: It could be genuine.