50 L. On 1, 75 L. Postal stamp, red overprint, variety \"double overprint in two different red shading, one of it inverted\", in perfect condition mint never hinged - very rare stamp, issued only 100 pieces but so far only a fraction (mostly regumed) have become known, in mint never hinged condition a Fata Morgana - here besides unsigned, expertise Brunel VP (2021) : \"the condition is perfect. \"