If it is 1965 it is the earlier type, which was positive earth.
However, I should point out that both the gauge systems are polarity independent, and work equally well on either polarity*. But the change in gauge systems happened at the same time that the polarity was changed.
Most earlier positive earth cars have been changed to negative earth because many modern accessories assume negative earth.
*Although the original post 1967 gauge system thermal voltage regulators are polarity independent, there are now solid state regulators sold that only work with negative earth.
John
JDNSW
1986 110 County 3.9 diesel
1970 2a 109 2.25 petrol
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