1904-10 Wmk Single Rosette SG #76 $50 green & ultramarine Sultan Ibrahim, very fresh MUH, Cat £475 (+ considerable premium for unmounted). (Image1)

Estimate AU$400

1918-20 Wmk MCA 5c dull purple & sage-green Sultan Ibrahim variety Wmk inverted, superb MUH, Cat £200+. (Image1)

Estimate AU$145

1922-41 Wmk Script CA SG #126 $50 green & ultramarine Sultan Ibrahim, fine mint, Cat £1,500. RPSL Certificate (1978). (Image1)

Estimate AU$1,000

1922-41 Wmk Script CA SG #127 $100 green & scarlet Sultan Ibrahim, expertised in pencil on reverse, fine mint, Cat £2,000. Rare. (Image1)

Estimate AU$1,400

1922-41 Wmk Script CA SG #127s $100 green & scarlet Sultan Ibrahim optd 'SPECIMEN', fine mint, Cat £450. (Image1)

Estimate AU$260

1922-41 Wmk Script CA SG #128s $500 blue & red Sultan Ibrahim optd 'SPECIMEN', rich unfaded colours, fine mint, Cat £1,400. (Image1)

Estimate AU$1,000

1937-40 Sultan Ismail SG #40-54 1c to $5 set, fine mint. Seldom offered as a complete set, Cat £1,100. (15) (Image1)

Estimate AU$675