MO1 vs MO1L

[Farmer Jon]

What is the difference between these...For a 46/47 B31. Thanks for everyone's help, it is very much appreciated.

[Bess]

Hi,
    The L denotes long type generator fitted.

Best wishes...

[Farmer Jon]

Thanks. Good for early B31? 

[idie]

Go for the long one 60 watts. Short one only 40 watts.