This design was later named "Crystal Blue Stripe" by Mdina, although it's an original Harris design, I believe it has been made continuously, right from the start almost.
The shape is reasonably early, '70s. The labels aren't too much use for dating, as we're in the '70s anyway. The script on Baked-beanses one is earlier than yours David.
I have a couple of these, I rather like them, and one of my exceptional Earthtones vases is this shape, and I've got a nice one where the design has accidentally gone into a sideways swirl.