Hi there. I have made contact with the home owner with your question.
The bricks are called “zwarte steen” - which is "black stone" in English.
Their local building company sourced it for them, so they don't know all the details, but they do know that the supplier is Verhaar Building, a local Delft business. They do not have the information in their specifications, so they do not know the manufacturer or product number.
Holly Marder
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