Born in Tønder, Denmark, Stephan Kenckel (1661–1732) had a short career in schoolteaching before becoming, in 1697, a customs master based in the provincial port town of Helsingør. Remarkably, Kenckel was a major collector both of musical instruments and of printed and manuscript music. We know this, since his music and instruments were put up for public auction after his death. The printed sale catalogue, the relevant contents of which are listed, described, and analysed, also includes, in the example studied, the handwritten names of purchasers and the prices they paid. The range of instruments—familiar and exotic, antiquated and newfangled-owned by Kenckel and the breadth of his musical repertory, which suggests the existence of a thriving collegium musicum active in Helsingør, testify to a higher state of musical development in early-18th-century Denmark than has been generally recognized.