Hoogeveen's Leesmethode, picture postcards

1) Hoogeveen's Leesplankje 'Aap-noot-Mies', J.B. Wolters' Uitgevers-Maatschappij. Groningen, The Hague, c. 1931. 30 x 22.5 cm. Images sl. dam. in places; 2) Letterdoosje, bij Hoogeveen's verbeterd leesplankje. J.B. Wolters', Groningen, The Hague, c. 1931. Tin with pressboard lettercards. 7.5 x 2.7 cm (2x); 3) Cards album 'Cartes Postales', with 321 inserted and 78 loose children's picture postcards, cityscapes, folklore to Gerri Meijer of Utrecht. Oblong folio, cloth, 27.5 x 38 cm. Mostly 20s and 30s, a few copies from the 40s and 50s.