Sandra Schmidt, Paris, is currently preparing a book on Peter P. Kronthal and is seeking information:
Peter P. Kronthal (1896-1967) started as dealer, then auctioneer for the art business of Jac. Hecht, Berlin, before running his own company in cooperation with Dr. Ernst Mandelbaum, the ‘Internationales Kunst- und Auktionshaus GmbH’ in Berlin-Charlottenburg (1929-1937). After his emigration in 1937 he lived in North London (46 North End Road) and worked as an independent art dealer until his death in 1967.
If you happen to have any information on him, please write to her here.