Because catalog systems vary wildly by publisher and your specific snippet "1/39" or "Ka..." could mean a few different things, please clarify which topic you are looking for before a full answer or guide is provided:

The details provided point toward a very specific philatelic entry regarding the postage stamps of Uzbekistan from July 4, 2015.

Please clarify which of these specific intents or topics you are asking about before a complete guide is provided.