Great Britain 1929 ½d- 1½d Postal Union Congress (Watermark Inverted), SG434/6varGreat Britain 1929 d1d Postal Union Congress (Watermark Inverted), SG434 6var Cancelled Type 33 Set A very fine unused set of three commemorative issues with original gum from the 1929 Postal Union Congress, comprising the d green, 1d red, and 1d brown values each with the watermark inverted and overprinted "CANCELLED" Type 33. The stamps are well centred with strong colour and sharp impressions. The d value displays clipped perforations on the right