Bird Definitive 30s - Watermark Variety

New print of bird definitive 30 sen (orginal print with inverted watermark was released on May 14, 2005) has upright watermark. However, inverted watermark on new print was recorded for series numbers 2007/4, 2007/5, 2008/3 and 2008/6. There could be other series numbers with inverted watermark have yet been reported. Anyway, I have only got inverted watermark for series numbers 2007/4 and 2008/6, and I have spare copies (block of 6 right top corner with series number) for exchange with those inverted watermark series numbers I have not yet possesed. Is anybody interested?