1911 - 1941, mint never hinged, unused and cancelled collection se-tenants and stamp booklet pages, partly in both conditions collected with among others Michel-no. W2.7, W2.10, W4, S1.2, S2.25, stamp booklet pane 8 bA, stamp booklet pane 9 IIaaA, and so on, partly expertized with some certificates and short attests, very high catalog value.