◊ obv: dark blue/gray - rev: brown
◊ obv: red - rev: green
◊ obv: green - rev: violet
◊ obv: red - rev: green
◊ 5 numbers 2 letters - obv: Violet - rev: Red
◊ Proof - no serial number - obv: Green - rev: Dark Blue
◊ 5 numbers 2 letters in black - obv: Brown - rev: Red
◊ 6 numbers 2 letters in red - obv: Black - rev: Yellow