1945-1956
CO = Collie Shire / Porcelain

1945-1956
DS = Dundas Shire / Porcelain

1945-1956
K = Kondinin Shire / Porcelain

1956-1968
B = Bridgetown-Greenbushes Shire

WY = Wyndham Shire

1956-1968
DB = Donnybrook-Balingup Shire / Private trailer

1968-1978
A = Albany Roadboard Shire

1970s
BY = Bunbury Town

1968-1978
CG = Coolgardie Shire

1968-1978
CR = Corrigin Shire

1968-1978
D = Dowerin Shire

1968-1978
KT= Kent Shire

1968-1978
PN = Pingelly Shire

1968-1978
TS = Three Springs Shire

1968-1978
WA = Warren Shire

1968-1978
Y = York Shire

1968-1978
Farm / BT = Boddington Shire

Non-shire statewide issue (no slogan type)

From 1985
A = Albany (Municipality)

From 1985
AK = Armadale-Kelmscott / Town plate

From 1978
BSN = Busselton Shire

From 1978
DB = Donnybrook Balingup Shire

From 1978
E = Esperance Shire

From 1978
EX = Emouth Shire

G = Greenough Shire

From 1978
GG = Gingin Shire

H = Harvey Shire

From 1978
KA = Katanning Shire

From 1978
KD = Koorda Shire

From 1978
KM = Kalamunda Shire

From 1978
KU = Kulin Shire

From 1978
M = Moora Shire

MK = Meekatharra Shire

From 1978
NB = Narembeen Shire

From 1978
PH = Port Hedland Shire

From 1978
PL = Plantagenet Shire

R = Roebourne Shire

From 1978
YA = Yalgoo Shire

1978-1996
Farm / CB = Cranbrook Shire

From 1978
Farm / TN = Tammin Shire

From 1997
BM = Broome Shire

From 1997
BSN = Busselton Shire

From 1997
KBC = Kalgoorlie-Boulder Shire

Kalgarin - Small And Proud

Swan Shire / Carriage plate / Porcelain