24.mm
 Cast brass, four holes, feather key | 24.mm1
 Cast brass, 4 normal and 4 large holes, feather key | 24.mm1a
 Cast brass, 4 normal and 4 large holes, tongue key | 24.mm4
 Bronzed steel two-part wheel, 4 holes |
24.mm2
 Machined brass, eight standard holes, tongue key | 24.mm3
 Disc 1/16'' thick, 1911 short boss, tongue key | 24.mm3a
 Disc 1/16'' thick, patent short boss, tongue key | 24.mm3b
 Disc 1/16'' thick, 1911 full boss, tongue key |
24.br1
 Disc 1/16'' thick, 1911 boss, single-tapped | 24.ni
 Nickelled steel disc, 1911 boss, single-tapped | 24.ni1
 Nickelled thicker disc, patent boss | 24.br2a
 Brass thicker disc, patent boss |
24.br2
 Brass disc 1/16'' thick, patent boss | 24.br3
 Brass disc 1¼'' diameter, patent boss | 24.br3a
 Steel disc, brass plated, recessed boss single tapped | 24.br3b
 Brass disc, recessed boss single tapped |
24.br4
 Brass disc 18swg, 1 3/8'' dia, standard boss | 24.br5
 Brass disc 18swg, 1 3/8'' dia, boss double tapped | 24.nb
 Steel face enamelled blue | 24.re
 Steel face enamelled red |
24.re1
 Steel face enamelled red, painted over Mazac bush | 24.ma
 Olive green, only two holes in face (Mech Army) | 24.br
 Post-war brass face, standard boss double-tapped | 24.bs
 Blackened steel face (Korean) |
24.br6
 Brass, 1 7/16'' diameter, edge not chamfered | 24.xx
 Black fibre insulated face, Electrikit part | 24.xx1
 Brown fibre insulated face, 4EL part | 24.mb
 Steel with matt brass finish |
24.ir
 Iridescent |