GB.GEORGE V – 1929 POSTAL UNION CONGRESS 1d scarlet, a never hinged mint lower right corner “K29” control block of ten, one showing “CO” joined, SG Spec. NCom6e, never hinged mint.

GB.GEORGE V 1929 POSTAL UNION CONGRESS 1½d purple-brown, blob on “1” variety, SG Spec. NCom7e, a mint example with large part gum, with some faults incl. upper right corner perf rounded and a small black ink mark at lower left. The rarest PUC variety, cat. £550.