Proof Protectorate States 1966 (Apr.) New Currency, proofs of the overprints on talc for 5f., 10f., 25f., 35f., 50f., 100f., 250f. and 500f., overlayed on Hadhramaut or Seiyun values affixed on two cards (195x147mm.) with the colour of the overprint required written below; three stamps with the overprints sadly missing.