Vintage Keuffel & Esser Co Improved Surveying Aneroid Compensated Transit. The item “Vintage Keuffel & Esser Co Improved Surveying Aneroid Compensated Transit” is in sale since Sunday, May 16, 2021. This item is in the category “Antiques\Science & Medicine (Pre-1930)\Scientific Instruments\Barometers”. The seller is “rick1993″ [...]