Dik Trom weet raad

Family film, #7 based on book series
–Year: 1976
–Year in film: 1890s ?
–Country: The Netherlands
–Who in clothing: Piet ~9 ?, sailor suit
–Who in clothing 2: hist. clothes
–Available on DVD: yes
–I own: no
–Clothing occurrence: medium+ ?
–Rating:  5/10 ?
–Rating: *****
–Comment: At least one boy in a sailor suit with dark blue collar, 3 stripes. Grey, knee-length knickers, Light blue, striped blouse, white sailor's hat, fixed with a string and wooden clogs.

A friend of the main character, probably Ferdy Vroomen as Piet van Dril (Flipse is a man). He also starred in other movies of this series, I also found that character in Dik Trom en zijn dorpsgenoten (1973 remake of the 1947 version of the same name), same clothes but movie is in b&w, also available as colorized version. Also in Dik Trom knapt het op. Other actor in sailor suit in Dik Trom en het circus (1960), b&w.

There are 11 movies and a 2012 musical, but I think most of the modern movies not showing sailor suits. Famous is the 2010 version, probably no sailor suit scenes (looks modern, and have bathing costumes). There should be a 2018 film Uit het leven van Dik Trom, but I haven't found that one.

I found this by coincidence during research.