OMSA Forum Member
Registered: November 2004
Pingat Hassanal Bolkiah Sultan Darjah Pertama
Instituted in 1968 and awarded in 2 classes (Gold Medal and Silver Medal). The post-nominal letters are PHBS, irrespective of class. I cannot find anything about the terms of award, but it seems to be for meritorious service in civilian life, judging by those who have received it.
This is the Silver Medal.