Kleiner Verlag Arthur Schaeffer, Berlin (K.V.B.)

Some cards have the full name and the logo in the circle and some just have variant logos, which I include here but which may not be the same publisher. However the plain letter logos I have seen are before 1911-12, the “complex” logo had appeared by 1907, and during WW1 the logo in the circle.

Thanks to Harold Hoff for the 1907 date and for pointing out that the captions below, now corrected, were mixed up and wrong.