Helmet shells
AMC: Austin Motor Co Cowley
BMB: Briggs Motor Bodies Ltd. of Dagenham
BS: William Beardmore Steel Co of Glasgow
EBW: Eveson Bros of Worchester
EC & CO: E Camelinat & Co Ltd. Birmingham
F & L:Fisher & Ludlow Ltd. of Birmingham
HBH: Harrison Bros & Howson. Sheffield
Helmets Ltd: Helmets Ltd. of Wheathampstead
JSS: Joseph Sankey & Sons Ltd. Bilston
WDS: William Dodson & Sons of Birmingham
RO & CO: Rubery Owen & Co Ltd. of Leeds
SO: Samual Osborne & Co Ltd. Sheffield
SC: Steel Ceillings Ltd. Hayes
Liners
AG: A.Garstin & Co Ltd.
BMB: Briggs Motor Bodies Ltd. of Dagenham
BH & G: Barrow Hepburn & Gale Ltd. London
CCL: Christy & Co Ltd. London
F&L: Fisher & Ludlow Ltd. Birmingham
FFL: Fisher. Foil. Ltd.
G.& S: Gimson & Slater of Nottingham
Helmets Ltd: Helmets Ltd. of Wheathampstead
JCS&W: J. Crompton Sons & Webb Ltd. London
LWL: Lane & Whittaker Ltd.
PPM :Patent Pulp Manufacturing Co Ltd Thetford.
SNL: S.E.Norris Ltd. Dagenham
TTC: Teddy Toy Co Ltd. Dagenham
Vero: Everett.W.Vero & Co London