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1928 Excelsior Big Bertha Hill Climber
£ 191,679.28 (€ 211,291.33)($ 250,000.00)


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  • Location United States of America
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In remarkable original condition! The ”M” cylinders, developed by the legendary Arthur Lemon, could be tuned for more power without over-heating. A pair of “M” cylinders on the Super X crankcase gave the 61 cubic inch V twin a major horsepower boost. This modification was nicknamed “Big Bertha”. Extremely rare because very few of these factory-built racers were ever produced. William V. Altman was part of the Joe Petrali team who won more than 31 consecutive hill climb competitions in 1928 and 1929.