1872 King William III, 25c dull violet, l.h., fine, cat. $525 (Cat No. 30) (Image)

Cat. $525, Est.$150

1872 King William III, 50c bister, n.h. and post office fresh, well centered, with handstamped guarantee and 1975 Koopman certificate, cat. $3750 (Cat No. 31) (Image)

Cat. $3750, Est.$1,000

1872 King William III, 2g50c rose & ultramarine, h.r., well centered, fresh and fine, cat. $900 (Cat No. 33) (Image)

Cat. $900, Est.$250

1891 Princess Wilhelmina, 50c yellow brown and 1g gray violet, l.h., well centered and fresh, fine-v.f., cat. $1175 (Cat No. 49,50) (Image)

Cat. $1175, Est.$250

1891 Wilhelmina, 5g bronze green & red brown, top sheet margin single, l.h., v.f., with Behr certificate, cat. $700 (Cat No. 54) (Image)

Cat. $700, Est.$250

1921 complete set of seven, well centered, l.h. or h.r., fine-v.f., cat. $634 (Cat No. GY1-7) (Image)

Cat. $634, Est.$250