NIKOLAI 3.4.1920 ZKr (231.1) on registered letter with the complete set postage stamps issue drawing numbers 1920, in addition to it the denomination value to 5 Pfg / 20 Pfg and 10 Pfg / 20 Pfg in each case overprint type I a provissional issue 1920 to Zurich / Switzerland, the cover was vertical folded, the stamps even are intact