Lithographer and printmaker, born in Berlin. He settled with his family firstly in Spain and then in London in 1936. In 1939 he was interned at Huyton as an 'enemy alien' and was then worked as a draughtsman in an aircraft factory, 1940–46, from 1947–50 studying at Central School of Arts & Crafts under Anthony Gross and Morris Kestelman. He was an apprentice at the Curwen Studio and was employed by them until 1967. His own printed works ranged from large, dramatic black-and-white etchings to exuberant, Expressionistic landscapes, employing among other colours vibrant reds and brilliant blues. Baer taught at several art establishments including Hammersmith School of Art and Chelsea School of Art and he exhibited at the RA, Beaux Arts Gallery, Ben Uri Gallery, Victoria & Albert Museum, Whitechapel Art Gallery and at the Camden Arts Centre. In 1986 he held a solo exhibition at the Boundary Gallery, London.