I had mine rebuilt some years ago - took these pictures when they came back from the shop.  The symbol on the castings is Hitachi.  The metal bands between the front and rear castings is supposed to be a dark green.  The shop painted the fan and pulley but the fan is supposed to be plated.  Kats has beautifully restored pictures on his web site, but I see that it is down at the moment.  I'm a little confused at the moment about the capacity of the alternator.  40amp?  45amp?  I would have to do some research.  Blue engine paint overspray is common / original.

This alternator (and engine bay wiring harness) has bullet connectors not the plastic spade connector. (Jan 1970 240Z production.)

Keith

Edited September 27, 2024Sep 27 by zed2

14 hours ago, zed2 said:

This alternator (and engine bay wiring harness) has bullet connectors not the plastic spade connector.

Keith

Because both of the wires coming out of that alternator case are yellow... with no other color stripes, they do not look factory to me.  Neither do the connectors which appear to have been spliced into the wires on the harness.  I suspect some wiring modifications were made.

 

Here are a couple pics of mine with the OE connectors.