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Applies to the small 18 liter tank from 09/1972.
R Boxer » /5 (69 - 73):
R 50/5 (0240) (09/1971 - 07/1973)
R 50/5, LBW nr.2906305 - ...
R 60/5 (0250) (09/1971 - 07/1973)
R60/5, LWB nr.2997987 - ...
R 75/5 (0260) (09/1971 - 07/1973)
R 75/5, LWB nr.2997987 - ....
R Boxer » /6 (73 - 76):
R 60/6 (0251) (07/1973 - 08/1974)
R 75/6 (0261) (09/1973 - 08/1974)
R 90/6 (0271) (09/1973 - 08/1974).
R Boxer » /5 (69 - 73):
R 50/5 (0240) (09/1971 - 07/1973)
R 50/5, LBW nr.2906305 - ...
R 60/5 (0250) (09/1971 - 07/1973)
R60/5, LWB nr.2997987 - ...
R 75/5 (0260) (09/1971 - 07/1973)
R 75/5, LWB nr.2997987 - ....
R Boxer » /6 (73 - 76):
R 60/6 (0251) (07/1973 - 08/1974)
R 75/6 (0261) (09/1973 - 08/1974)
R 90/6 (0271) (09/1973 - 08/1974).