It should not come as a surprise that a specialized stamp society such as the KSS has among its membership quite a few highly specialized members. However, it does sometimes feel as if the KSS has more of those specialized members than quite a few other stamp societies. It is of course purely anecdotal, but it does seem to be that collecting Korean stamps, “statistically” already quite a specialty in itself amongst philatelists, almost automatically comes with even more specialization.
Within the KSS this has led over the years to an almost over-representation of what one might call “specialized specialty collectors“, at least amongst the KSS members actively writing. The Christmas seals are one example, the revenue stamps are another one. And here is an example of that last category: the commodity tax stamps of South Korea.