A 1925 Rolls-Royce, which was specially developed for hunting expeditions, is to go under the hammer in California next month.
Craftsmen in Derby and London created the New Phantom, keeping in mind the demands of a tiger-hunting Indian maharaja.
Powered by a six-cylinder engine, the vehicle features a mounted double-barrelled shotgun, searchlights and a machine gun on a trailer.
It enabled Umed Singh II, Maharaja of Kota, to explore the jungles of Rajasthan.
The custom built Rolls-Royce is likely to fetch around $1 million (£619,000) when it is put up for sale in Carmel on August 18 and 19. The auction will be conducted by Bonhams.
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