Constable’s The Lock Sells for £22.4m ($35m) at Christie’s July 3, 2012 by Marion Maneker More from Art Market MonitorChristie’s Offers £25m Guardi in London This JulyLondon Old Master Sales = £37mChristie’s Old Master HighlightsChristie’s London Old Master Eve = £23.85mChristie’s London Old Master Evening = £85mChristie’s London Old Master = £24.13m