Government Analysis Seal, Image by StuE, Found by Terry Mallinson.
Found at Langham near Colchester, 21mm.
Government Guaranteed Analysis - Company not fully displayed but cornucopia trade mark suggests Ohlendorff, the predecessor to the Anglo Continental guano company.
Ohlendorff & Co., was founded in 1858, transformed into the Anglo-Continentale corporation in 1883, taken over in 1937 by Fisons Ltd and closed in 1946.