The Bancor was a supranational currency that John Maynard Keynes

John Maynard Keynes

John Maynard Keynes, Baron Keynes of Tilton, CB FBA , was a British economist whose ideas have profoundly affected the theory and practice of modern macroeconomics, as well as the economic policies of governments...

 and E. F. Schumacher

E. F. Schumacher

Ernst Friedrich "Fritz" Schumacher was an internationally influential economic thinker, statistician and economist in Britain, serving as Chief Economic Advisor to the UK National Coal Board for two decades. His ideas became popularized in much of the English-speaking world during the 1970s...

 conceptualised in the years 1940-42 and which the United Kingdom proposed to introduce after the Second World War. This newly created supranational currency would then be used in international trade as a unit of account within a multilateral barter clearing system – the International Clearing Union

International Clearing Union

The International Clearing Union was one of the institutions proposed to be set up at the 1944 United Nations Monetary and Financial Conference at Bretton Woods, New Hampshire by British economist John Maynard Keynes...

– which would also have to be founded. The Bancor was to be backed by barter and its value expressed in weight of gold.