£30 - £40
Great Britain: Robertson Automatic Variable Speed Gear Co. Ltd., £1 preference shares, 19[28], #106, large format piece with vignettes in each corner of motor car, steamship, aeroplane and lorry, brown and blue. A specialist gear wheel transmission, used for example by Kerr Stuart in their locomotives but also applied to other vehicles. Court order to wind up in 1933. VF and scarce.
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