Welfare stamp booklet 1929, front cover with "valid until 30 April 1930", the word April on the front cover overstamped "Juni" (June) in violet-blue ink, booklet panes 66 and 67 B, margins not perforated through and interleaf unprinted, mint never hinged, original staples, perfect condition, unsigned; this variety with the validity month altered by handstamp is not recorded in Jürgen Hettinger's stamp booklet handbook 2023.