Mastera
Subtitle: knizhka-zagadka
By: L. Feĭnberg
Publisher: Gos. izd-vo
Published: 1931
Place of publication: [Moscow]
Language: rus
Notes: Cover title.

Illustrations show tradesmen surrounded by their products (printed in light red). When viewed through the red gel, their products disappear, revealing the tradesmen with their tools.

Pub. red and green pict. wraps plus a red transparency laid in.