Ink and watercolour on paper, stamped “Nachlass Martin Lauterburg n° 318” below right on the back of the sheet, 42.7 x 31.6 cm. Private collection, Switzerland.

Charcoal on paper stamped “Nachlass Martin Lauterburg n° 371” below right on the back of the sheet, 47 x 36.7 (36.4 cm) cm (irregular size of the sheet. Collezione privata, Svizzera.

Grpahite on paper, signed “M Lauterburg” on the front below right and stamped “Nachlass Martin Lauterburg n° 466” below right on the back of the sheet, 37 x 26.6 (26.4 cm) cm (irregular size of the sheet). Private collection, Switzerland.

Coloured chalk and mixed media on paper, stamped “Nachlass Martin Lauterburg n° 66” below right o the back of the sheet, 60 (58.4 cm) x 45.5 (43.7 cm) cm (irregular size of the sheet). Private collection, Switzerland.

Ink and watercolour on paper, stamped “Nachlass Martin Lauterburg n° 315” below right on the back of the sheet, 29.3 x 40 cm. Private collection, Switzerland.

Watercoloured ink on paper, stamped “Nachlass Martin Lauterburg n° 495” below right on the back of the sheet, 36.1 x 47.4 cm. Private collection, Switzerland.

Graphite on paper, signed “M. Lauterburg” top on the left and staped “Nachlass Martin Lauterburg n° 474” below right on the back of the sheet, 36.2 x 50.7 cm. Private collection, Switzerland.

Watercoloured ink on paper, stamped “Nachlass Martin Lauterburg n° 710” below right on the back of the sheet, 40.2 x 29 cm. Private collection, Switzerland.

Graphite on paper, stamped “Nachlass Martin Lauterburg n° 246” below on right and with stamp of the Swiss Customs 1.27 top right on the back of the sheet, 36.1 x 50 cm. Private collection, Switzerland.

Watercoloured ink on paper, stamped “Nachlass Martin Lauterburg n° 439” below right and Swiss Customs January 1927 top right on the back of the sheet, 36.7 x 46.1 cm. Private collection, Switzerland.