The D4W65 and 4W65 Patrol models were released in 1959. The 4W65 was more contemporary looking with rounded edges on the fenders and a bit of slope to the hood. If you look at the diagrams of the two models on the last page, you can see the from the rear seating arrangement that the 60 series Patrols were actually designed after the D4W65. Feel free to download the pdf attachment, for your viewing pleasure!