Transcribed from the materials classes listed in the 'Key to abbreviation in store file', dated 4 May 1928.
A
Glass
AA
Leather, hide, skin
B
Silver
BB
Minerals
BBB
Building materials
C
Sheffield plate
CCC
Plaster casts, plaster items generally
COM
Composition
D
Pewter
E
Copper
F
Bronze
G
Brass
GO
Gold
H
Ivory, horn, bone, etc
J
Iron, Steel, tin
K
Carved wood
L
Stone, marble, etc
M
Wood
OP
Plated, ormolu, gilded, etc
Pottery & earthenware
RR
China, porcelain
SS
Enamel
TT
Mother-of-pearl
W
Wax
WW
Coral
X
Decorated metal
XX
Shell, includes tortoise shell
Y
Terracotta
Z
Fabric