There aren't any objects involving Pennwood Numechron Co. that have been photographed yet or maybe they have (had their pictures taken) but we can't show them to you right now.

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/18045021/ |title=Pennwood Numechron Co. |author=Cooper Hewitt, Smithsonian Design Museum |accessdate=23 May 2019 |publisher=Smithsonian Institution}}</ref>