Folder of eight 'Progressive Proofs' of an illustration of German enamelled glasses, in four colour separation.

The eight proofs, each 24 x 38 cm, some with tissue guards, are bound into a blue folder with triangular printed Burlington Engraving label. In pencil on the folder: 'Connoisseur | April 1937 | German Enamelled Glasses | 4 colour'. In fair condition, on lightly worn and aged paper. The final illustration (first in the folder) shows the six glasses, enamelled in various colours, against a black background.