OK Zed Head, etc, here's the unicorn you asked about. I have a 1/71 in my shop - VIN 18437 - getting a well deserved rehabilitation after years of neglect. It has later seat belts with 6 & 7/71 production dates. It has the early visors and a Redwing interior mirror.
Want to touch on a subject Carl Beck brushed up against regarding the early years of selling imported cars. In those pre 1970 days import dealers, the exception being VW, were strictly Mon & Pop operations. They often started out as used car lots or service operations that sold imports as almost a sideline. My first dealer sold BMW, Saab and NSU before picking up Datsun in mid 1970. The showroom could accommodate 3 cars and there were 5 service bays. A good month saw 3-5 cars being sold. Dad was the sales dept, son ran service and Mom kept the books. Their necks were stuck way out and it showed. They started in the car business at a smaller facility as a VW and Porsche repair shop. So, you're a Fiat, Renault or NSU dealer in 1966 with 4 cars left on the lot and it's Dec. You know those machines aren't going anywhere soon so what to do. You apply to the MVA and change the titles to 1967. Now you have 4 67s - a very common practice in those days. This all changed with the Japanese invasion of the early 70s. Now you're moving lots and lots of cars, as many as you could get per month. We didn't need a larger showroom as the Datsuns were sold before they had a chance to display them. Dad wasn't a salesman any more, he was an order taker.