From an earlier posting I made on SCF:
Quote:There is a printed catalogue available for North Korean stamps, as described here. I have a 2006 edition.
http://nokostar.com/Stamp-Catalogue.phpI wouldn't call it a specialized catalogue - the listings are quite brief and are apparently missing some data available in Michel. For example, your rouletted 1957 4th Congress stamp (which you say is listed in Michel as both perf 10 1/2 and imperf) is only listed as perf 10 1/2 in the DPRK catalogue, which also fails to mention anything about rouletted copies.
There is also a DPRK CD-ROM catalogue occasionally available on
ebay - I don't see it listed at the moment. I think it's from a US seller, but I can't be sure of that.
The KPC catalogue shown by Rod lists only South Korean issues after the Korean War. SG Part 18 and Michel Übersee 9/2 both have full listings for North Korea, as does Scott. What info are you specifically looking for that you can't find in Scott?
Ryan