Sample book of blue printing, double-fold cardboard printed on 4 sides with white pattern. 1st front side: printed area horizontally divided into two fields – top: in diagonal stripes on a blue background, identical ornamental motifs composed of four semicircles with a dot. Number 319 pasted in the middle at the top. – bottom: in diagonal stripes on a blue background, identical stylized dotted flowers with a stem, a leaf, and a thick dot. Number 320 pasted in the middle. 2nd side: printed area horizontally divided into two fields – top: in diagonal stripes on a blue circular background, white dotted circles. – bottom: in diagonal stripes on a blue circular background, identical small triple dots with a thicker dot at the top. Number 322 pasted in the middle. 3rd side: printed area horizontally divided into two fields – top: in diagonal stripes, identical ornamental motif representing a blue circle with a white dot eccentrically placed on its edge. Number 323 pasted in the middle at the top. – bottom: in diagonal stripes, identical ornamental motif representing a blue square with a white tendril. Number 324 pasted in the middle. 4th back side: printed area horizontally divided into two fields – top: in diagonal stripes, identical ornamental motif representing a blue circle with a trio of white dots in a row. Number 325 pasted in the middle at the top. – bottom: in diagonal stripes, identical ornamental motif representing a blue oval with small white dots arranged with a curve and a trio of larger dots on it. Number 326 pasted in the middle.