Opening of the new showroom for Van Messel's Automobiel Bedrijf, Amsterdam, 1929. M. Charles van Messel, seated center (1). Mevrouw Van Messel (2). Onder-directeur W[olf] Kiesman (3). (source: conam.info)
Hedwig Rebecka van Messel-Marx (2); her husband, Maurits Charles van Messel (1); and two boys, possibly their sons Robert (second from left) and Hans, in 1929. (source: conam.info)