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RollsRoyce Bristol Siddeley Olympus Mk. KeskiSuomen ilmailumuseo . en RollsRoyce Bristol Siddeley Olympus Mk jet engine serial number in the Aviation Museum of Central Finland This example was the number four engine right outermost engine of Avro Vulcan XM fi RollsRoyce Bristol Siddeley Olympus Mk suihkumoottori valmistusnumero