Netherlands Indies Postal Stationery Collection, approx 40 mint and 35 used postal cards and entires neatly arranged on Lighthouse pages, note Postal Cards 1874/84 5c with boxed "NAPOSTTIJD" marking, 1874/84 12½c with "1879 "Veldpost Atjeh" cancel, 1879 5c on 12½c with nice strike of Sidhoardjo c.d.s., 1909 5c+5c message card used, reply card unused; Envelopes 1909 17½c mint, generally Fine or better, well worth a look.
Netherlands Indies Squared Circle Postmarks Collection, approx. 250 stamps neatly arranged on Lighthouse pages, mostly on 1870/88 William III issue (mostly the 10c) with add'l Numerals, 1890s/1900s Wilhelmina and postage dues, good variety of towns and with majority of the cancels easily legible, generally F-VF (no photo)
1924 Stockholm World Postal Congress Specimen Overprints, complete set of the 49 issues with special boxed red "SPECIMEN" overprint, o.g. with varying degrees of hinging, few with some gum toning spots or light even gum toning, still a fresh and F-VF set, all with a small blue signature handstamp on gum (NVPH EUR800)
147b, 1921 32½c on 50c Green Type I, Perf 11x11½, pair, P.O. fresh, NH, some small natural gum skips in left stamp, Very Fine and quite rare; 2003 NVPH certificate (Scott $2,000 for hinged; NVPH 145A, EUR2,500 for hinged)
C17a, 1932 50c on 1.50gr Orange, Inverted surcharge, fresh color, light evenly toned o.,g., very lightly hinged, light corner perf bend, Fine and scarce, of the 50 stamps issued only about 35 mint examples are available; signed by several incl Koopman and with his 1965 certificate (Scott $1,800; NVPH LP17f, EUR2,750)
Netherlands Indies - Japanese Occupation Period Collection, nice starter collection with some better overprints, definitives, covers, money orders, etc., mostly F-VF, well worth a look (see on-line scans).