We have 2 objects that De 3 Klokken (the 3 Clocks Factory) has been involved with.

If you would like to cite this person in a Wikipedia article please use the following template:

<ref name=CH>{{cite web |url=https://collection.cooperhewitt.org/people/18048411/ |title=De 3 Klokken (the 3 Clocks Factory) |author=Cooper Hewitt, Smithsonian Design Museum |accessdate=20 September 2020 |publisher=Smithsonian Institution}}</ref>