In March 1962, the Dutch Consumentenbond released an article in their own newspaper, the Consumentengids, comparing the 14 most popular cigarette brands in the Netherlands at the time based on their tar and nicotine levels.

The brands Three Castles, Peter Stuyvesant, Chief Whip, and Alaska had the smallest amount of nicotine in their smoke.

Blok challenged the Consumentenbod, claiming that their test results were inaccurate, and performing his own tests in London, New York City and Zürich with different results, one showing that the amount of tar was as low as 12.1 mg, compared to the 63.9 mg in the Consumentenbond report.

Bartholomeus Buitendijk, one of the two original founders of the Consumentenbond, reacted on the radio about Blok's accusations concerning the test.

Abraham Blok said that it was not an exaggeration, due to the fact that the manufacturer of Lexington had lost millions after the publication of the article.

The primary demand was that the Consumentenbond would have to release an extra edition of the Consumentengids within one week containing a correction to the test report.

After several days of testimony, the final judgement on 22 June 1962, concluded that there was no standard way of testing, and the Consumentenbond should have realised this before publishing the article.

The judge (an avid subscriber to the Consumentengids who had not smoked for years and hoped that he would not lose his subscription) said that Lexington was right but did not agree with all the demands made by Blok.

Especially Elsevier and several trade magazines lashed out at the company, calling the test "shameful and harmful" and the Consumentenbond "meddlesome" and "left-leaning".

The Consumentenbond was accused of being inaccurate and "dilettantist", but had also gained valuable publicity and were praised as a small company who had bravely fought against the producer of a big and popular brand of cigarettes.

Even though Blok had won the court case, the constant association between the Consumentenbond test and his brand, as well as the ever-increasing fear of smoking and health hazards in the Dutch market, caused Lexington's market share to crumble within two years from nearly 25% to 7%, declining to a second-tier brand within a few years.