https://unstats.un.org/unsd/trade/imts/Historical%20data%201...
Percentage of world exports in 1960:
United States 16%
West Germany 9%
UK 7.8%
France 5.4%
https://www.wto.org/english/res_e/booksp_e/wtr13-2b_e.pdf
Percentage of world merchandize exports in 1980:
USA 11%
West Germany 9.5%
Japan 6.4%
China 0.9%
Thus the claim that Germany is a leading exporter because of Euro currency manipulation fails to explain why Germany was one of the leading exporters in the 60s, 70s, 80s, 90s, 2000s and 2010s. In all those years it was in the top three.