1908-19 Precursor use of GB KEVII 1/- green doubleton postal stationery cut-out on piece with type I cachet. SG C1 cat 'from £4000' on cover. The cut-out alone must be rare, plus premium for cachet (P) (Image1)

Estimate AU$200

1928 Cachet type IVa in red special split circle cachet 'ISLAND OF' in addition to 'Tristan da Cunha' on toned/aged envelope, with cachet type III in red at left. SG C5 cat £5500 = A$10,000. Rarity. (P) (Image1)

Estimate AU$1,000