The star of the auction is the 1929 Brough Superior SS100 known as Moby Dick, the fastest motorcycle of the 1920s. It has attracted a pre-sale estimate of £240,000-280,000.
Hailed in its day as 'the fastest privately owned machine in the world suitable for road use', this motorcycle is expected to prove very popular with bidders.
Tested by Motor Cycling magazine in 1931, 'Moby Dick' achieved a top speed of 106mph, a staggering achievement at a time when very few road vehicles of any sort were capable of reaching three-figure speeds.
Further tuning of the modified 1,142cc v-twin engine later raised that figure to 115mph in top (third) gear, with 109mph achievable in second.
 The 1929 Brough Superior SS100, known as Moby Dick |
Sold but later repurchased by the vendor's family, Moby Dick was restored in 1998 and since then has continued to delight and amaze enthusiasts wherever it appears.
Other highlights in the sale include a 1924 Brough Superior 980cc SS80 which represents a rare opportunity to purchase one of the earliest surviving SS80s.
It is estimated to sell for £75,000-95,000.
The auctioneer "aims to build on the incredible success of our April auction and its £2 million result," said Ben Walker, Head of Motorcycles at Bonhams. "With in excess of 200 machines we aim to have something for everyone."
Watch this space for more news on the sale.
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