Weiser says:
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Um, evidently you missed it...the EU didn't exist in 1972.
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Pedantic semantics again.

For your information:
"The first step in European integration was taken when six countries
(Belgium, the Federal Republic of Germany, France, Italy, Luxembourg
and the Netherlands) set up a common market in coal and steel...

The six member states then decided to build a European Economic
Community (EEC) based on a common market in a wide range of goods and
services. Customs duties between the six countries were completely
removed on 1 July 1968 and common policies - notably on trade and
agriculture - were also set up during the 1960s."

http://europa.eu.int/abc/12lessons/index2_en.htm

Since customs duties were removed in 1968, I obviously was able to
travel within the EEC (pre-cursor of the EU) in 1972 without stopping
at borders.

frtzw906