Gustav Liersch & Co, Berlin

There is a partial catalog of GLCo cards in the Image Archive section of the Ross postcards site, which includes an account of this company.

GLCo was a member of the NBC Cartel.

At this link there is a large collection of illustrations of GLCo cards, with many of the subjects identified.

1909 Katalog
GLCo 2447-6
GLCo 2447-6 (verso)