A large number of harpsichods, amongst others the Rucker harpsichord, which was bought by Gustav Leonhardt, and now belongs to the Sweelinck Academy of Music in Amsterdam.

A lot of pianos, e.g. the Broadwood -square of Sigiswald Kuyken, and the one from the Van Loon Foundation in Amsterdam.
A large number of grand pianos, e.g. a Berndt (Breslau 1840), a Simon 'Schüler von Conrad Graf 1835), and a lot of Erards, including the one from Jos Van Immerseel.

Restauration of the Tröndlin - pianoforte of Jos Van Immerseel (see article: Beethoven and the pianoforte, by J. Van Immerseel.)