c.1905 Diamant 180cc 1½ hp
Frame no. 19
Diamant (Diamond), initially the trade name of the small-capacity 'clip-on' engines sold with control sets and designed to be mounted into suitable bicycle frames, were made by Elite-Diamant Werke A.G. in the early days of the industry in Sachsen, eastern Germany. The large-engined motorcycle was relatively rare in that era, as the ease of control made lightweights more desirable and commercial. Similar to many companies at this time, the firm initially entered the market through the manufacture of motorcycle-style and proprietary-powered motor tricycles. Their own ingenious overhead-valve power units were also used for two-wheelers, and the 'clip-on' units soon transformed into the company's own single and V-twin range of complete motorcycles before the works returned to engineering work c.1908. Motorcycle production was resumed in the mid 1920s and continued until 1940. This restored machine is an example of Diamant's 'clip-on'-style motorcycles, confirmed by the method of attaching the engine to the frame, showing the heavy bicycle type prevalent a century or so ago. The motor-spirit tanks, oil-tank and most of the tank-top controls are in brass, and transmission tension is controlled by the large stepped quadrant on the near-side. The oiling system appears quite complex and, unusually, a gauge is fitted. A period of fascinating research lies ahead for the new owner of the Diamant, both historical and practical. Careful checks should take place before riding in any Veteran event. No documents are supplied with the Diamant.
- c.1905 Diamant Re-creation
We are advised that this Lot is a modern re-creation manufactured by a former owner, a Mr Weissmüller, using a Diamant bicycle frame and wheels dating from circa 1912/16 and the crankcases from an American Shaw engine dating from circa 1916/18. The cylinder head and all the engine internals together with the fuel tank, handlebars, levers, controls and gauges were hand made by Mr Weissmüller, who sold the machine around four years ago at the Ludwigshafen motorcycle show.
The frame number for this lot is 537.
The engine number for this lot is 238090.