Pre - war Polish callsigns

• Official licences issued by Ministry of Posts and Telegraphs
• SP 1 + 2 letter suffix : individual,club stations < 1 Jan.1929 - 31 Aug.1939 >
• SP 2 + 2 letter suffix : military,police,government persons < 1933 - 31 Aug.1939 >
• SP 3 + 2 letter suffix : individual,club stations < 1938 - 31 Aug.1939 >
• Unofficial licences issued by Clubs
• TP + 2 letter suffix < 1925 - 31 Dec.1928 > next eTP + 2 letter suffix < "e" since 1 Feb.1927 >
• SP 3 + 2 or 3 letter suffix : individual,club stations < 1 Jan.1929 - 31 Mar.1933 >

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