35 C. Postal stamp blackish cobalt, overprint II dark rose red, original stamp with inverted watermark, tied by part of cancellation the railway mail \"LJUBLJANA-KARLOVAC\", faultless condition. The edition this watermark-variety amounts probably only 35 pieces, from the 15 known copies is only this an used thus an unique piece! Photo expertize Krischke: \"the condition is perfect. It should be as well an unique piece act. \", Michel - .