Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Aden - 1954, Aerogramme 50c gray blue, printer's plate proof in unsevered horizontal pair with 134mm gutter between and 130mm selvage at left on bluish paper, three-line instead of two-line inscription at the bottom(one reverse), and indicia is in 4mm from the border (common - about in 10mm), insignificant folds, still VF and rare item