Code before the year

O = Old (1907-1922)

C = Car 

M = Motorcycle, Motorbike 

V = Moped (in French Vélomoteur)

X = TaX

P = Trailer (in Finnish Perävaunu)

W = Tractor (”Work”)

E = Export

T = Customs (in Finnish Tulli)

D = Diplomat

K = Test run/Dealer (in Finnish Koekilpi)

S = Transit/Temporary (in Finnish Siirtokilpi)

A = Army

Å = Åland Island  

G = Government

B = Bicycle

H = President (”Head”)

Code after year

I = Iron

A = Aluminium

M = Brass (in Finnish Messinki) 

N = Nickel-plated

W = PlyWood 

T = Sticker (in Finnish Tarra)

P = Painted

E = Embossed

B = Black

R = Reflective

H = High

L = Low

S = Short / Small

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