The Panther Page

Engine Number Codes

Engine numbers follow a fairly common format which aids easy identification of models. (On the M75/65 and I suspect many other models the engine number is located on the crankcase just below the barrel.) The number is generally of the form:




YY is the year of manufacture. Generally just add 1900! My 1949 M75 starts with just a 9 so there is some variation but not sufficient to produce real ambiguity

XX is the alphabetic model code as follows:
Code Model Details
A 80 500cc
D 70 350cc
GS 50  
H 60 250cc
J 65 250cc
K 75 350cc
M 100 600cc rigid
MS (pre 1957) 
100 600cc swing-arm, 
half-width hubs
MS (post 1957) 100 600cc de-luxe
V 10/3 
197cc Villiers
VA 10/3A 197cc Villiers
VT 35 Villiers twin 
VTS 35 Sports Villiers twin
VTT 45 325cc Villiers 
(not earlier M45)
W 35 Villiers twin, post 
1964 Red Panther
X Stroud  
ZA 120 650cc
NNN is the serial or batch number.

M is the alphabetic modification code. This indicated within a given production year the revision or modification number. I believe that these start at A.

As an example 56K065A is a Model 75 manufactured in 1956 to the original (unmodified) 1956 specifications and was the 65th engine (batch of engines?) made that year.

Other codes, such as assemblers codes sometimes appear.

Disclaimer All data are provided in good faith. Neither I nor the originator of the data accept any liability for problems arising from using this information. It is your responsibility to ensure that the advice is sound. If your local laws do not allow this disclaimer then you are not permitted to read this section.

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