Antiques Roadshow guest refused to sell an ornament despite it receiving a jaw-dropping valuation.Expert John Foster recognised the distinctive Bluebird hydroplane model as a model of the actual vehicle that was driven by world speed record breaker Donald Campbell.In the re-run episode at Forty Hall, Enfield, the guest said he acquired the model from his grandfather, who took over as lead constructor with a company in Coventry that went on the land-speed record in 1964.The streamlined plane model is painted in blue with some black taped markings on top and a figurine in the pilot seat."I think it was made for either design presentation or even aerodynamics, a wind tunnel perhaps," he told John."In one of these pictures, he [my grandfather].
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