Here's my post from the previous discussion:
The reference to "bright accented parking lamps" was deleted as of the January 2, 1969 rev to the US dealer ordering info. Still there for Canada but maybe just an oversight.
Depends on how the revision was managed. Parking lamps were received at the plants as an assembly. That means there was finished goods inventory at each plant, in transit, and at the source. The source also had RS lenses in process. Materials decides on the disposition of all of it. They may have used up on hand inventory and diverted the remainder to service stock. Or they may have decided to consume all of it in production. One day they are building RS cars with standard lamps, next day a shipment of RS lamps arrives and they use those. Like the 68/69 spoilers, either could have been used for a period of time. Tough to reverse-engineer.
