However, it was not until revision of the Rule in 1920 when the Sixes really became a popular international racing class. The 1920s and '30s were 'golden age' of the International Rule boats and Sixes were still the most popular class, attracting top sailors and designers to compete for prestigious trophies such as Scandinavian Gold Cup and Olympic medals.
It wasn't until the revision of the rule in 1920 that the Sixes became a prominent international racing class. The 1920s and '30s are often considered the pinnacle of International Rule boats, with the Sixes remaining the most popular class, drawing top sailors and designers who competed for coveted prizes such as the Scandinavian Gold Cup and Olympic medals.