I understand that the OD has no bearing on this as the prop shaft maintains
constant rotation, it is the motor that changes. After I looked more closely
at the speedo (and others) I realized that my back case has two holes for
lights to fit into the speedo (not the high beam). Other 3 speedos I have
do not have lights, rather they rely on central dash lighting (?) and the
light comes through openings in the case. I am not sure what I have here.
other numbers on the speedo are SN 6319/06 and then 1216 just under the
odometer where the 11XX usually is.
69 TR6 CC26160L
60 TR3A TS74461LO
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