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Oxford Air Training School OATS 120TrainingClassroom
O-Cedar LtdOCedar1ChemicalsCleaning Agent
Oddie Bradbury & Cull LtdOddie19FastenersPanels
Oddy & Co. W.D.Oddy9ComponentsPropellers
Oerliken Machine Tool WorksOerliken1WeaponsArmaments
Oil Engines (Coventry) LtdOilEngines5MaintenanceStationary Engines
OK SupremeOKSupreme1Aeronautical Engineers
Old Bleach Linen Co Ltd. The OldBleach1MaterialsFabrics
Oldham & Son LtdOldham39ComponentsBatteries
Olley Air Services LtdOlley1Air TransportAirlines
Olympic AirwaysOlympicAirways2Air TransportAirlines
Omes LtdOmes17ManufacturingForging
OmnipolOmnipol94Aircraft ManufacturersNon UK
Omnium CentralOmnium6SuppliersSpare Parts
Optical Measuring Tools LtdOpticalTools3Engineering EquipmentTest Equipment
Orbit Motors LtdOrbitMotors1ComponentsPumps
Orcene Products LtdOrcene1ChemicalsCleaning Agents
ORD Engineering Co ORD2FabricationSheet Metal Work
Orenda Engines Ltd Orenda 27Engine ManufacturersNon UK
Organisations (Misc)Organisations5OrganisationsProfessional
Oriental Tube Co LtdOrientalTube5ManufacturingTubing
Ormerod Engineers LtdOrmerod1ManufacturingTurned Parts
Ormond Engineering Co LtdOrmond3ManufacturingMachining
Osborne Aircraft Components LtdOsborneAircraft1AircraftEngineering
Otter Controls LtdOtterControls2ComponentsControls
Oval School Of FlyingOvalSchool3TrainingFlying School
Overhaul Activities Overhaul Services LtdOverhaulActivities1EngineeringMaintenance
Overseas Aviation (C.I.) LtdOverseasAviation1Air TransportAirlines
Owen Bros & Co LtdOwenBros1FinishesPaints
Owen Davies Engineering Co LtdOwenDavies1ManufacturingSheet Metal Work
Owen Organisation. The OwenOrganisation1ManufacturingComponents
Oxford Aviation OxfordAviation0 Aircraft Sales
Oxley Developments LtdOxleyDevelopments1ComponentsElectronics
Oyler & Co LtdOyler3ComponentsSeating
Ozalid Company LtdOzalid1Engineering EquipmentDrafting