b"18127127** 4d Olive-Yellow (Mullett printing) marginal block of (8), few light tones in margin only, stamps fresh MUH, BW:114C - $3200+. Rare multiple of an elusive shade. $8001,000128128P 5d Yellow-Brown Single-line Perf: the UNIQUE imperforate plate proof corner block of 4 [L49-50/55-56] in the issued colour on ungummed watermarked paper BW #122PP(3)A, cancelled with two strikes of the 36mm 'COMMONWEALTH.AUSTRALIA/POSTMASTER/GENERAL'S / 19JUN21 AM/DEPARTMENT' cachet,Cat $50,000: see Note 3 on page 4/349. One of the most visually arresting items in the entire Georgian Heads Series: illustrated at page 4/348.Ex Dr Leslie Abramovich, Charles Zuker and Arthur Gray. The ACSC states that these are the only examplesin private hands, the adjoining 'CA' Monogram block of 4 being in the Australia Post Archives.$20,00025,000"