£1,000
H. S. EYRE 'BLADE LOCKED FEATHERING PROPELLER' DEMONSTRATION MODEL the finely constructed model raised on a wooden plinth, with a plaque stating 'H.S. Eyres. Patent. Feathering Propeller. H. C. Ahrbecker. Stamford Street London', and a presentation box containing a description of the design and its function, the model stands 36cm high. Provenance: The Estate of the Late Rufus Eyre
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