Thematics: technique-physics: 1957, France, 18fr. Isaac Newton, epreuve de artis
Thematics: technique-physics
1957, France, 18fr. Isaac Newton, epreuve de artiste in brown on ungummed paper, and imperforate colour proof block of ten with coins date (eight uni, two multi-coloured, shades of purple/violet) mint never hinged.
Condition: ** (mint never hinged)/(*) (mint without gum)...