Oligocene Period, circa 45 million years B.P. A block of polished Baltic amber with inclusions including multiple Diptera insects. 7.56 grams, 63 mm (2 1/2 in.). From the Baltic Sea coast, Primorskoje mine, Kaliningrad. English collection formed in the 1990s. UK art market. Property of an Essex gentleman. apanied by an illustrated identification card with provenance.