peep show box, probably late 18th century, wood, height: 53.5 cm, width: 18.5 cm, depth: 12 cm, back can be slide in, original mirror with stronger worn places, along with it 12 folded letters, in original paper, always with 1 set of 6 cassette pictures, 2 folded letters with components resp. back sheets with signature, Martin Engelbrecht, print, handcoloured, is a museum piece