Each small v. bound in decorative. Some vols. have variant paper from copies for sale online. These commercial titles have very much the look and feel of Peter Pauper private press books although some of the paper is very brittle.
Insel-Verlag. Fünfzig Jahre Insel-Bücherei, 1912-1962
Nr. 1 (451.-500. Tausend) - Nr. 5 (no ed. statement, advertisement laid in) - Nr. 9 (26. bis 35. Tausend, advertisement laid in) - Nr. 24 (no ed. statement) - Nr. 28 (128.-140 Tausend) - Nr. 30 (11.-20. Tausend) - Nr. 77 ([1 A] 31. bis 35. Tausend, advertisement laid in) - Nr. 92, ( [1A] 1, no. ed. statement ; [1B] 36.-40 Tausend) - Nr. 131 (c. 1, 21.-25. Tausend) ; c. 2, last 2 p.of advertisements vary from c. 1) - Nr. 186 (no ed. statement) - Nr. 224 (136.-bis. 145. Tausend, 1957) - Nr. 288, 1 (no ed. statement) - Nr. 406 (61.-80. Tausend) - Nr. 461 (41. bis 50. Tausend, 1955)