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Macfarlane Thirsk (Engineers) LtdMacfarlaneThirsk1ManufacturingMachining
Macks Structures (London) LtdMacksStructures3StructuresHangars
Maclennan and Co. John Maclennan13Fixtures and FittingsAGS
Macready's Metals Co LtdMacreadysMetals2ManufacturingSteel
Macrome LtdMacrome47Engineering EquipmentMachining
Madgwick LtdMadgwick1LogisticsPackaging
Magenta Time Company LtdMagenta13FactoryPA Broadcast Systems
Magnesium Castings & Products LtdMagnesiumCastings59ManufacturingCastings
Magnesium Elektron LtdMagnesiumElektron36MaterialsElektron
Magnetic Devices LtdMagneticDevices2ComponentsElectrical
Magnesium Castings & Products LtdMaguminium2MaterialsMagnesium Alloys
Malcolm Farquharson LtdMalcolmFarquharson2Aircraft Suppliers
Mallinson & Eckersley LtdMallinsonEckersley6FactoryLogistics
Mallock Armstrong Ear Defender CoMallockArmstrong29ClothingSafety
M.A.N.Turbo GMBH M.A.N.1Engine ManufacturersNon UK
Manganese Bronze And Brass Co LtdManaganeseBronze22ComponentsBearings
Manchester Oil Refinery (Sales) LtdManchesterOil3ChemicalsNDT
Mann Egerton & Co LtdMannEgerton12Aircraft Manufacturers
Taylor, Bolton. George Manufacturing113ManufacturingCastings
Marconis Wireless Telegraph Co LtdMarconi498AvionicsWireless
Marconi-Elliott Avionic Systems LtdMarconiElliott11AvionicsRadio
Maricon LtdMaricon8ComponentsRefuelling
Marshall Osborne & Co LtdMarshallOsborne1MaterialsBearium Bronze
Marshalls Flying School LtdMarshalls18TrainingFlying School
Marsh Brothers & Co LtdMarshBrothers11FastenersWire
Marston Ltd. John Marston12ComponentsRadiators
Marston Excelsior LtdMarstonExcelsior95ComponentsRadiators
Martin Company. The Glen L. Martin26Aircraft ManufacturersNon UK
Martin-Baker Aircraft CoMartinBaker358Survival EquipmentEjector Seats
Martindale Electric Co LtdMartindale6Ground EquipmentCleaning Tools
Martinsyde LtdMartinsyde33Aircraft Manufacturers
Martin Thomas LtdMartinThomas5Ground EquipmentStaging
Marwin Machine Tools LtdMarwinMachineTools2Engineering EquipmentMachine Tools
Masson Seeley & Co LtdMassonSeeley2ManufacturingPrecision Engineering
Mastermodels LtdMastermodels5ModelsDisplay
Matchbox. Lesney ProductsMatchbox7ModelsDisplay
Materials. (Misc)Materials24MaterialsBronze
MatraMatra22WeaponsMissiles
Matthews & Yates LtdMatthewsYates2ComponentsElectrical
MauleMaule4Aircraft ManufacturersNon UK
Mavitta Drafting Machines LtdMavitta28Engineering EquipmentDrafting
May & Baker LtdMayBaker5MaterialsTransparencies
Maybrey. H.J.Maybrey1ManufacturingCastings
Mayrow Industrial Systems Ltd. The Mayrow1ManufacturingComponents
Mayro-Wing Aviation CoMayroWing1Aircraft Constructors
Messerschmitt-Bolkow-BlohmMBB61Aircraft ManufacturersNon UK
M.B.InternationalMBInternational1TestingTest Equipment
M.B. Metals LtdMBMetals22ComponentsCables
M & B PlasticsMBPlastics1MaterialsPlastics
M.Calderon LtdMCalderon2ComponentsElectrical
McAlpine AviationMcAlpine10Air TransportAir Charter
McColl's Asbestos & Rubber CoMcColl1CommunicationsGaskets
McDonnell DouglasMcDonnelDouglas157Aircraft ManufacturersNon UK
McGowan, Wild & CoMcGowanWild2Engineering EquipmentWelding
McGraw-Hill Publishing Co LtdMcGrawHill1LiteraturePublishers
McGruer Bentwood Hollow Spar CompanyMcGruerBentwood5ManufacturingComponents
MCL And Repetition LtdMCLRepetition378FabricationFasteners
McMichael Radio LtdMcMichael10Instrument ManufacturersTest Equipment
McMurdo Instrument Co LtdMcMurdo2Survival EquipmentLifejacket Lights
McDonnell DouglasMD1Aircraft ManufacturersNon UK
Middle East Airlines MEA1Air TransportAirlines
MEA Magneto Co LtdMEAMagneto1ComponentsMagnetos
The Mears Ear Phone CoMears1AvionicsIntercom
Mechanische Werkstaetten Neubrandenburg G.M.B.HMechanische1ManufacturingComponents
Mechanism LtdMechanism37Instrument ManufacturersFlight Instruments
Meerloo & Sons. John Meerloo22Engineering EquipmentMachining
 Meir. City AerodromeMeir1Airfields
M.E.L.Equipment Company Ltd. The MEL1AvionicsRadio
Mendine CoMendineCo6MaterialsAdhesives
Mercury Truck & Tractor Co LtdMercuryTruck35Ground EquipmentGround Handling
Mervyn InstrumentsMervynInstruments1TestingTest Equipment
MESHMESH3Aircraft Manufacturers
Messenger Bros LtdMessengerBros2ManufacturingSheet Metal Work
Messerschmitt AGMesserschmitt6Aircraft ManufacturersNon UK
Messier. British Messier118ComponentsLanding Gear
Mestre & BlatgeMestreBlatge9ComponentsTubing
Metachemical Processes LtdMetachemical21ComponentsDe Icing
Metafiltration Company LtdMetafiltration8Engineering EquipmentFilters
MetalairMetalair73FabricationSheet Metal Work
Metal Airscrew CoMetalAirscrew6ComponentsPropellers
Metalectric Furnaces LtdMetalectricFurnaces1Engineering EquipmentFurnaces
Metalline Aviation LightingMetalline5AirfieldsLighting
Metallisation LtdMetallisation16FinishesTreatments
Metal Propellers LtdMetalPropellers26MaterialsSteel
Metals Coating Co LtdMetalsCoating1FinishesPaints
Metal Sections LtdMetalSections1ManufacturingSections
Metalstick LtdMetalstick41ComponentsBearings
Meta-SokolMetaSokol1Aircraft SuppliersDistributors
Meteorlite Ltd. A-L Meteorlite2ManufacturingWelding
Meteor Manufacturing Compnay Ltd. The MeteorMfg4ManufacturingComponents
Meterflow LtdMeterflow1Instrument ManufacturersTest Equipment
Metropolitan Plywood CompanyMetropolitanPlywood3MaterialsWood
Metropolitan Vickers Electrical Co LtdMetrovick16ComponentsCastings
Mexfield Aviation (Sales) LtdMexfield1Aircraft SuppliersDistributors
Meyrowitz Ltd. E B Meyrowitz61ClothingFlying Clothing
M.H.Godden (Cheltenham) LtdMHGodden8ComponentsIndustrial Weavers
M.H.H. Engineering Co LtdMHHEngineering6Ground EquipmentHand Tools
Mica Products LtdMica1MaterialsMica
Micanite & Insulators Co LtdMicanite3MaterialsPaxolin
Michel. Aviation Michel1Engine ManufacturersNon UK
Microcell LimitedMicrocell22ComponentsCabin Seating
Middlteon Sheet Metal Co LtdMIddlteonSheet8ManufacturingSheet Metal Work
Midland Aeroplane CompanyMidlandAeroplane2Aircraft ManufacturersGlider
Midland AeroquipmentMidlandAeroquip5ComponentsCastings
Midland Fan Co LtdMidlandFan3Ground EquipmentPaint Spraying
Midland Motor Cylinder Co LtdMidlandMotorCylinder6ComponentsCylinders
Midland Motor Radiator Company.The MidlandMotorRadiat1ComponentsRadiators
Midland Presswork CoMidlandPresswork3ManufacturingPresswork
Midland School Of FlyingMidlandSchool4TrainingFlying School
Midland Silicones LtdMidlandSilicones1MaterialsRubber
Miesse Petrol Car Syndicate. The Miesse1Engine Manufacturers
Miles. Phillips & Powis Aircraft (Reading Ltd)Miles246Aircraft Manufacturers
Miller Aviation LtdMiller9Aircraft PartsAGS
Mills Ltd. William Mills43FabricationCastings
Mills Equipment Company. The MillsEquipment1ManufacturingSafety Belts
Minchin Engineering Co Ltd. The MInchinEngineering2ManufacturingComponents
Mining And Chemical Products LtdMiningAndChemical20ChemicalsFusible Alloys
Minox LtdMinox1PhotographyCameras
Mintex. British Belting & Asbestos LtdMintex7ComponentsBrakes
MiraliteMiralite1ComponentsPistons
Miscellaneous ItemsMisc571Unclassified
MISR Airwork S.A.EMISR2Air TransportAirlines
Mitchell Fox & Co LtdMitchellFox1ManufacturingMachine Tools
Mitchell Hydraulics LtdMitchellHydraulics1ComponentsHydraulics
Mitchell Wedgwood & CoMitchellWedgwood1ComponentsAGS
MitsubishiMitsubishi17Aircraft ManufacturersNon UK
M.L Aviation Company LtdMLAviation124RecruitmentDrafting
M-L Magneto Syndicate LtdMLMagneto3ComponentsMagnetos
M.Mole & Son LtdMMole1ManufacturingPresswork
Moblil. Vacuum Oil Co LtdMobiloil85Lubricant Suppliers
Kleemann Plastics LtdModels156ModelsDisplay
Modern Furnaces & Stoves LtdModernFurnaces2Engineering EquipmentFurnaces
Modern Industrial Finishes LtdModernIndustrial3FinishesPaints
Modern Machine Tools LtdModernMachine1ManufacturingMachine Tools
Modern Precision Engineers (Finchley) LtdModernPrecision1ComponentsAvionics
Mollart Engineering CoMollart82ComponentsControls
Monaco Motor & Engineering Co LtdMonaco4Engine Manufacturers
Monarch Airlines LtdMonarch1Air TransportAirlines
Monarch Engineering Co LtdMonarchEng4ManufacturingSheet Metal Work
Monarch Tool Co LtdMonarchTool2Engineering EquipmentMachine Tools
Mond Nickel Company Ltd. The MondNickel9FinishesHeat Treatments
Monkbridge Iron & Steel Co LtdMonkbridge2ManufacturingFoundries
Monk Engineering Co LtdMonkEngineering7FabricationJigs
Monochrome LtdMonochrome2FinishesElectroplating
Mono-Spar Co LtdMonospar2ManufacturingAircraft
MonsantoMonsanto12ChemicalsHydraulics
Montgomery Smith & Co LtdMontgomery Smith2Engineering EquipmentHand Tools
MooneyMooney12Aircraft ManufacturersNon UK
Moore Bros Co LtdMooreBros1Engineering EquipmentHand Tools
Moore & Wright (Sheffield) LtdMooreWright1ManufacturingTools
MoravaMorava1Aircraft ManufacturersNon UK
Morfax LtdMorfax1Aeronautical Engineers
Morgan Crucible Co LtdMorganCrucible5MaterialsCarbon
Morgen Avco LtdMorgenAvco1Pilot SuppliesNavigation
Morris Ltd. B.O. Morrisflex48Ground EquipmentEngineering
MorrisonsMorrisons34FabricationContractors
Morris,Russell & Co LtdMorrisRussell4ManufacturingSheet Metal Work
Moseley & Sons Ltd. David Moseley12Fixtures and FittingsCushions
Moss Bros & Co LtdMossBros12ClothingFlying
Moss Brothers Aircraft LtdMossBrothers2Aircraft Manufacturers
Moss Gear Co LtdMossGears2ManufacturingGears
MotoimportMotoimport38Aircraft SuppliersDistributors
MotokovMotokov6Aircraft Manufacturers
Motor Components (Coventry) LtdMotorComponents1ManufacturingMachining
Motor Mac's LtdMotorMacs2Aeronautical Engineers
MotorolaMotorola 3PersonalRadio
Motorplanes LtdMotorplanes2ComponentsPropellers
Motor Radiator Manufacturing CoMotorRadiator9ComponentsRadiators
Motor Radiators LtdMotorRadiatorS1ComponentsRadiators
Mount Cook AirlinesMountCook1Air TransportAirlines
Mountford (Birm) Ltd. Fredk Mountford22FastenersAGS
Moxons LtdMoxons1AirfieldsSurfaces
Muir & Adie LtdMuirAdie2Engineering EquipmentCompressors
Muirhead & Co LtdMuirhead3TestingTest Equipment
Mullard LtdMullard6AvionicsRadio
MullinerMulliner3DistributorsPropellers
Multicore Solders LtdMulticore28MaterialsJointing Compounds
Multiplex Advertising Machine Co LtdMultiplexAdvert1ManufacturingCapstan Milling
Murad Machine Tool Co LtdMurad15Engineering EquipmentMachine Tools
Murex Welding Processes LtdMurex64Ground EquipmentGround Handling
Murphy Radio LtdMurphy19AvionicsNavigation
Musgrave & Co LtdMusgarve4FactoryAir Conditioning
Musgrave & Co LtdMusgrave1FactoryAir Conditioning
Musgrove & Green LtdMusgroveGreen2ManufacturingSheet Metal Work
Mustikon LtdMustikon3Wheels And TyresPuncture Repair
Myers & Co. S.J.Myers9Engineering EquipmentRiveting