A vakblad is a trade journal. Trade journals became popular in the early 1900s, though some go back further.
Trade journals can have interesting information about your ancestors, such as:
- information about completed education or achieved diplomas
- membership of unions, committees, organizations
- publications by our ancestors
- information about their employers
- images of the trade they were in.
You can find trade journals by searching the Tijdschriften [magazines] section at Delpher.
Example: Butcher’s exam
On 5 March 1943, the journal for butchers published the list of people who successfully completed the exam to become a butcher. The exam took place in Breda on 22 February 1943. Of the 21 candidates, 15 passed. Among when was my grandfather, Jan Marijnissen from Breda.