From 1964-1971 Sir Otto was Professor of Comparative Law at Oxford - and became very influential in the establishing of labour law studies in the University. His knighthood in 1976 was for "services to Labour Law."
The Bodleian Law Library inherited Sir Otto's library of labour law material on his death in 1979. These items have the shelfmark K.F. and are available in the ground floor reading room of the library. (In the same room as the Bodleian Official Papers collection which include ILO publications.)
For further information on his life and influence see
Industrial Law Society Bulletin, No. 11, September 1971 Cw UK 300 I14
M. Freedland "Otto Kahn-Freund (1900-1979)" in Jurists Uprooted: German-speaking émigré lawyers in twentieth century Britain. eds Beatson & Zimmermann (2004) Legal Hist. B396a