Philippine Two Matching flight covers: 1935 2c Rizal (383) tied by Manila 3-11-35 machine cancel on Netherlands Royal Naval Air Force First Goodwill Flight #99a (old #99) from Manila to Puerto Princesa with 3-12 receiver and 1933 4c & 12c Airmail overprints tied by Manila 3-11-35 machine cancel on Netherlands Royal Naval Air Force First Goodwill Flight #99b (old #100) from Manila to Soerabaya Java with 3-15 receiver. Both with Special Flight cachet type 70. Attractive matching covers on elusive flights. Fresh & Very Fine.