- New
29/04/1968
50 £. - Key with letters CEPT - Red and Green - Perforation stamp 14 × 13 ¼ p - Watermark stars IV - Intaglio printing - Printed from IPS Workshop cards values - Sheets 50 - Size 40 × 30 (mm) - Drawing H. Schwarzenbach - Circulation 20.000.000.
Specific References