Well, if that's true there might be some potential issues since some countries require European IDPs to be according to 1949 convention and they are only valid for one year, 1968 model IDPs are valid for up to 3 years.
True, tanning was made popular in the 1920s partly by fashion icon Coco Chanel. Photographs of her surfaced after she had sunbathed on a cruise and became popular,