Good Clocks, Watches, Wristwatches, Barometers & Scientific Instruments Auctioned by Sotheby's at London on 30 May 1991, 463 lots, prices ranging to 45,000 British Pounds
Important Clocks, Watches, Wristwatches, Barometers and Scientific Instruments Auctioned by Sotheby's at London on 3 October 1991, 463 lots, with Results of Sale ranging from 165 to 49,500 British Pounds.