25 C. Merkur blue-green as block of four with two vertical overprinted note stamps pairs as correctly franked 1 Fr. franking on cover from "Dunkerque 2. 8. 40" to Malo les Bains with arrival stamp from 3. 8. 40, faultless condition, signed Dartyre and red owner sign as well photo expertize Lothar autumn VP (2015) : "the condition is perfect. The stamps are only in very small printing from 800 pairs issued become. There only a small proportion of it remained well preserved is, are such stamps very rare. Different overprint position (K) "falling) top down running) is as special feature to mention. ", Michel 2. 100.-