20l. ultramarine in block of 4 (pos.51-52/61-62) with plate flaws "spot on the chin" (pos.51) and "wide border" (pos.62). Full original gum, very fresh colour and large/even margins all around but lower pair creased horizontally at top (heavily) and pos.62 stamp with thin. Still a fine, attractive and rare multiple of superb appearance. (Hellas 57a).