Blue print sampler – double-sided cardboard with printed white pattern. Side 1: in the upper part, the number 581 is attached, in the middle the number 582. The entire surface is horizontally divided into two decorative motifs – above: symmetric composition of six-pointed stars in dotted spiral frames, – below: a quartet of dotted loops, among which is a stylized dotted flower. The ornament is complemented by dotted volutes. Side 2: in the upper part, the number 583 is attached. The entire surface is covered with a symmetrical “net” pattern composed of tiny dotted squares, waves, and branches. Side 3: the surface is horizontally divided into two fields – the upper part is adorned with a symmetric composition of dotted bi-walled circles, partially covered by toothed wheels with a dot in the center. The number 584 is attached on top. – the lower part is decorated with symmetrically arranged small identical flowers with stems. The number 585 is attached in the center. Side 4: the surface is horizontally divided into two fields – the upper part is decorated with small stylized linden flowers covering the entire area. The number 586 is attached on top. – the lower part is adorned with a symmetrically arranged motif of alternating smaller and larger tiny dotted flowers. The number 587 is attached in the center.