This is a tough one... I would say its a model 67 if I had to choose between the two. The "Hoover" on the bag seems to be reflective, which it would have been on the model 67, not the 65. That ink used on the 67's bag was silver.
What throws me though is the tie that the gentleman in the foreground is wearing, I would think the picture date is correct at 1970. Neckties were much thinner in the late 50s and early 60s.
The other thing I notice is the brown Tufflex hose in the box, behind the cleaner. If the cleaner had been given before 1963, it would have been a white Ultraflex hose.
Maybe the cleaner was old stock from wherever it was purchased?