Of the motorcycles in the batch, 144 were equipped with sidecars. The remaining motorcycles had seen very little use. This combination made the collection particularly unusual. The sidecar motorcycles represented a distinctive configuration of the Harley-Davidson police motorcycle, while the lightly used machines provided examples that had experienced comparatively little wear.
The condition of motorcycles is an important consideration for collectors. A motorcycle that has been heavily used over many years may have considerable historical value because of its service record, but it may also require extensive restoration. A motorcycle that has seen little use can preserve more of its original components and appearance. Consequently, the lightly used motorcycles in the Middelbosch acquisition were potentially valuable to enthusiasts interested in maintaining historically significant machines.
The large number of sidecar-equipped motorcycles was equally important. Sidecar Harley-Davidsons are visually distinctive and mechanically different from ordinary two-wheeled examples in their practical configuration. Their presence in such numbers meant that the acquisition represented an unusually concentrated group of motorcycles with a particular historical character.
