Sieds' Factories manufactured Concrete Products such as fence post, bricks
etc. He had his main factory in Leeuwarden with a second Plant in Dokkem.
During the WW2 he buried all his account papers under a concrete slab in his
garage, this proved to be a very clever move, as after the war creditors came
to collect monies they said was due to them, but he proved with thesepapers
that he already paid these accounts.They lived at Vincent va Goughstraat 1,
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