At the start of the Second World War the Swiss government tried to maintain trade relations with all belligerents. In order to safeguard vital supplies and channel them through the blockades and economic warfare restrictions applied by both sides, it had to conduct complicated negotiations with its economic partners – not only Germany but also the Allies.
Robbery and Restitution : The Conflict Over Jewish Property in Europe / M. Dean, C. Goschler, P. Ther. - New York, 2007. - p. 187