Flt Lt Francis Flynn WW2 POW signed Escape from Stalag Luft III RAF Escaping Society cover RAFES SC4. Flown by RAF Varsity with Polish WW2 Fighter stamp and Watchtower Zagan special Postmark. Back of cover has RAF Gatow RAF Post office cachet. Presented mounted with corner mounts on A4 page with typed details to top. We are breaking the most comprehensive set of these covers in the coming months including almost every variety of the covers produced. Good condition Est.