SAB57-H2 T1 : 1957 - FDC '1st flight by helicopter SABENA Bruxelles-Paris'

N°SAB57-H2 type 1 : Special FDC travelled on '1st regular flight by helicopter SABENA BRUXELLES-PARIS" Aerial transit at the departure from the Saar under temporary French administration.
Postage (type 1) serie 3 values 5F+2F, 12F+3F, 15F+5F 'Winterberg, Reconstruction funds of the Sarrois monuments' (YT 355/57), 6F 'Suspended bridgeof Mettlach and factory Vileroy-Bosch' (YT 310)
Cancellation St. Ingbert (Saar) 27.2.1957
+ black authentification postmark of the flight '1st line Bruxelles-Paris SABENA HELIPOST 3.3.1957'

+ Slogan arrival postmark Paris 'North station' 3.3.57 overleaf.