2l. bistre canc. "ΠΑΤΡΑΙ*16 ΜΑΡΤ. 1888". On Papaioannou study mentioned as first known dates on 2l. bistre Belgian print (page 14-15) two items both canc. in Patras at 17 and 24 of March 1888. An absolute exhibitional item in superb quality. A very important rarity of the Greek philately. (Hellas 62).