50 Heller airmail with vertical, to the left situation hand stamp overprint "1. X. 1938 plus swastika", neat cancelled, issued only 105 examples, of it very few with vertical overprint, expertized Osper BPP (signed twice) and photo expertize Robert Brunel BPP (2009) "the condition is perfect. With lying overprint are only two examples have become known", Michel 900.-