Scanning through the numerous picture of 240Zs on this site and others I've noticed a difference between some cars: On the front guard panel (UK:wing), cars may or may not have a turn signal. All cars have turn signals below the front bumper but not all have the extra one on the guard.

Is the presence of absence of this signal related to the year of manufacture or the market the car was sold in? Something else?

UK cars didn't have the indicators/sidelight under the bumper. the pannel simpley didn't have the hole in it. instead they has rectangular lights hung off the bumperbar, or sitting on top of the bumperbar. This was due to local design laws, probably because of the limited visibility of the normal indicators from certain angles.

Aussie cars didn't have the side indicators either. or the side markers on the rear side pannels of the car. as they weren't required by our local laws.