378th Auction
21-26 March 2022 in Wiesbaden
1886/88, numerals 5 c. blue and 10 c. vermilion, tied to registered envelope from Atlixco to New York with frontside three different register labels (Atlixco, Puebla and UPU)
1886/88, numerals 5 c. blue and 10 c. vermilion (2), tied to reverse of registered envelope against acknowledgement of receipt from Mexico City to Germany with frontside two different UPU register labels and New York transit register label