A RARE SET OF FOUR GRADUATED COPPER AND BRASS 'CHEKPUMP' COUNTY PETROL MEASURES WRAGG BROTHERS, ESSEX, CIRCA 1960Each with hinged loop handle over brass cylindrical inlet within a flared collar incorporating spill drain tap to top, over conical neck incorporating external capacity calibration adjtment sleeve, the larger two fitted with five brass anti-dent slips and two varioly with copper caps to the calibration sleeves stamped WRAGG BROS. LTD., WICKFORD, ESSEX, the waists with brass band inscribed DURHAM COUNTY COUNCIL and IN 20(degrees) C and labelled for capacities two, five, ten and twenty litres, with tip handles to rear and brass-strengthening band to base.The largest 46cm (18ins) high, 33cm (13ins) wide.Wragg Brothers limited was established in 1958 by Edward, Richard and William Wragg and they immediately developed a relation with Colin Chapman of Lot Cars whomissioned them to manufacture the early bodies for the Lot 7.The vessels forming the current lot would have been ed by operatives working for Durham County Council Weights and Measures Department (now part of Trading Standards) for checking the calibration of garage forecourt petrol delivery pumps to ensure that fuel dispensed was equal to the amount charged for public e.