Royal Dutch Glassworks. P.M. Cochius became director 1912 and the company started commissioning designers to prepare suites of modern glass tableware and drinking sets, as well as vases and ornaments. These designer sets were acid etched with the designer's mark. Their designers included C.J. Lanooy, Hendrik P. Berlage, Andries D. Copier, and Floris Maydam.

We have 29 objects that Leerdam Glasfabriek has been involved with.

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<ref name=CH>{{cite web |url= |title=Leerdam Glasfabriek |author=Cooper Hewitt, Smithsonian Design Museum |accessdate=19 April 2019 |publisher=Smithsonian Institution}}</ref>