50 Heller postal stationery as unlabeled question part a 50 Heller paid reply postal card (Czechoslovakia number P 38) with genuine overprint from Liberec, cancelled by special cancel "Liberec 1 / . / -eighth of October 1938 / . " these postal stationery has still no characteristic catalogue number and according to current Michel postal stationery catalogue 2025 / 2026 lay so far only a, probably these, card with overprint on P 38 before, therefore unique. photo expertize Brunel