Guatemalan quetzal 5, 10, 20 and 100 quetzales, with quetzal notes added in 1933. In 1946, the Bank of Guatemala took over the issuance of paper money, with its first issues being overprints on notes of the Central Bank. Except for the introduction of 50 quetzales notes in 1967, the denominations of banknotes were unchanged until and 1 quetzal coins replaced notes at the end of the 1990s. In the top-right corner of the obverse face of each banknote, the value is displayed in Mayan numerals, representing Guatemala's cultural history. The Bank of Guatemala has introduced a polymer banknote of 1 quetzal
Basic command unit units (which are based on the 32 London boroughs). The term Operational Command Unit (OCU) is used for specialised units, for example the Aviation Security OCU. However, since March 2018 the Metropolitan Police now has 3 BCU's "Basic Command Units". 1) Central North - the joining of Islington and Camden Boroughs. 2) East Area - the joining of Barking and Dagenham, Havering and Redbridge Boroughs. 3) Central East - the joining of Tower Hamlets and Hackney boroughs. West Midlands Police is split into 10 Local Policing Units (LPUs). Each LPU is in turn organized into four "Core Policing Teams" (CPTs)