A thread by Rick Lokos showing a link to a website on Canadian perfins led me to search for one of Hong Kong perfins (although HK is a primary collecting area for me, perfins are not).

And here it is! Great site, very detailed work.

http://rodsell.com/hkperfins/hkperfin.html
It is part of a larger site on HK security markings:

http://rodsell.com/hksmsic/hksmsic.html
Cheers,
Peter