Netherlands. 1913 Independence 2½c. to 10g. set of twelve, fine unmounted mint. Briefmarkenprüfstelle Certificate (2005). S.G. 214-225, £1,800; NVPH 90-101, €3,985 (Image1)

Est. £500-600

Netherlands. 1913 Independence 10g. orange on vermilion, unmounted mint. S.G. 225, £1,200; NVPH 101, €2,250 (Image1)

Est. £300-400

Netherlands. 1926-39 Queen Wilhelmina 9c. orange-red and black with margin at left showing number "1", variety value omitted, a fraction gum toned otherwise fine unmounted mint. Extremely rare with only twenty examples possible, all coming from the first vertical row of the sheet. Briefmarkenprüfstelle Certificate (2003). S.G. 315Aa, £22,000: NVPH 181Af, €17,500 (Image1)

Est. £3,000-4,000

Netherlands. 1926-39 Queen Wilhelmina 9c. orange-red and black with margin at left showing number "3", variety value omitted, a little gum toned otherwise fine unmounted mint. Extremely rare with only twenty examples possible, all coming from the first vertical row. Briefmarkenprüfstelle Certificate (2003). S.G. 315Aa, £22,000: NVPH 181Af, €17,500 (Image1)

Est. £2,000-3,000

Netherlands. 1943 (Jan.) First European Postal Congress, 10c. on 2½c. yellow with surcharge omitted, tiny natural paper inclusion at foot, otherwise fine unmounted mint. Very rare. S.G. 570a, £7,500; NVPH 404f, €6,250 (Image1)

Est. £1,200-1,500

Netherlands. 1949-52 Queen Juliana 1g., 2½g., 5g. and 10g., fine unmounted mint. Raybaudi Certificate (1980). S.G. 698-701, £1,700; NVPH 534-537, €1,300 (Image1)

Est. £150-200

Netherlands. Netherlands Indies. 1938-40 watermark rings 50c. indigo block of four from the foot of the sheet, unmounted mint, folded through the central vertical perfs., fine. S.G. 410, £2,000+ (Image1)

Est. £400-600

Netherlands. 1893 Queen Wilhelmina, perf.11½ 2g.50 ultramarine and rosine, unmounted mint, trace of light gum toning, otherwise fine. Briefmarkenprüfstelle Certificate (2005). S.G. 158, £750; N.V.P.H. 47A, €650 (Image1)

Est. £100-150

Netherlands. 1899-1910 1g., 2½g., 5g. and 10g., unmounted mint, the 1g. to 5g. a touch gum toned, the 10g. fine. S.G. 194-197, £1,600; N.V.P.H. 77-80, €4,075 (Image1)

Est. £300-400

Netherlands. 1920 "2.50" on 1905 10g. orange-red and 1913 10g. orange-vermilion, fine unmounted mint. S.G. 236-237, £450; N.V.P.H. 104-105, €800 (Image1)

Est. £100-120

Netherlands. 1921 Marine Insurance 15c. to 7½g. set of seven, all a little gum toned, otherwise fine unmounted mint. Briefmarkenprüfstelle Certificate (2005). S.G. M238-M244, £900; N.V.P.H. BK1-BK7, €1,500 (Image1)

Est. £150-200

Netherlands. 1923 Accession set,, fine unmounted mint. S.G. 259-269, £650; N.V.P.H. 121-131, €1,280 (Image1)

Est. £150-180

Netherlands. 1942 Legion miniature sheets, fine unmounted mint. S.G. MS 569A-569b, £340; N.V.P.H. 402B-403B, €290 (Image1)

Est. £80-100

Netherlands. 1946 Queen Wihlemina 1g., 2½g., 5g. and 10g., fine unmounted mint. S.G. 616-619, £750; N.V.P.H. 346-349, €600 (Image1)

Est. £100-150