Holborn 6500 prototype
This Holborn is a very unique one. Inside is a Holborn 6110 with, like every 6110, a Holborn 9120 motherboard placed on top.
However, the case of this specific Holborn is not like the Holborn 9120 or 6100, but of the prototype Holborn 6500. The Holborn 6500 is the successor of the 6100. Exact details about this machine are not known, there are only 2 of them. It probably doesn't make much difference with the 6110.
The biggest improvement is that 5.25" drives would be placed on the case instead of the 8" drives as used by the Holborn 6110. To make this space, the keyboard is no longer part of the case, but separate .
The case itself is also rounder than the original 6110.
This specific Holborn is therefore a 6110 Holborn in a 6500 case. There is no serial number on the case, but internally there are some serial numbers as shown in the photos. The date is stated as 15/09/1982 on the terminal board (9120). The processor board (6110) is dated 01/09/1982.
The Holborn has come into the hands of Mr. Jeff Masschelein. Joseph (Jef) Masschelein (born in Roeselare 1947) grew up in Staden, West Flanders, Jef had a great passion for electronics. He studied physics in Leuven. After his studies, Jef became a physics teacher in Weert, the Netherlands. Electronics was Jef's big hobby. He was especially passionate about the development of the computer. As early as the mid-1970s, his students could take extracurricular computer and programming lessons with him. These lessons were a great success and a real computer club was founded at his school in Weert in the late 1970s. This was special at the time. Most people at the time did not have their own computer at home (Jef of course did). Jef was passionate about the development of the (personal) computer. He built up an extensive collection of old computers in his country house in the Ardennes. After his retirement, Jef developed a new hobby (amateur radio) and moved back to Staden in West Flanders, where he died in June 2021.
This Holborn most likely came into the hands of Jef through a friend working or directly related to Holborn. After Jef's death, the Holborn was temporarily in France, after which it was brought to the HomeComputerMuseum in early 2023 and transferred ownership.