Schoeneberger Luxuspaper-Industrie Felix Freund, Schoeneberg-Berlin

Early cards from around 1902 are photographs printed by collotype and later cards were printed photographically. Many photo cards also have the NPG logo on the right hand side, particularly those with numbers below 2100 approx, so NPG presumably printed them. The subjects/models are female performers and children, with a lot of overlap with those appearing on NPG cards and (later) Rotophot cards. The firm was a member of the NBC Cartel.

Wikimedia Commons mentions a connection in 1904 between Freund and the publisher Paul Hoffmann & Co, also of Schoeneberg, but gives no details.

By the 1920s the company Felix Freund Kunstverlags-Anstalt Berlin-Schönenberg was publishing metre-sized artistic prints.

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