CH 1963 F46 Pro Aero - 25 years Pro Aero - 2 x First Day Full Cancellation

Switzerland 1963 Air post stamps - Pro Aero,
Pro Aero - 25 years Pro Aero,
 2x with First Day Full Cancellation:
1. Flight: Langenbrück-Bern-Locarno - (50 Jahre Alpenueberquerung durch Oskar Bider),
2. Flight: Bern-Locarno (25 Jahre Pro Aero), both on 13.VII.1963, stamps without rubber, luxury quality,
Catalog SBK F46, Michel 780.