Sometime in the very early 70's appears to be when Kendal made the change. The first quart cans to show the more modern look are from around '70-'73 although I'm not completely certain of this so someone correct me if I'm wrong here. Like most companies in any industry, keeping a fresh modern image with updating of logos has always been a practice......not always for the better in my mind. Sometimes the old logos are so graphic that over time, they become more and more costly to produce on modern items as prices to produce those items continue to become more costly. Advertising after all, isn't cheap these days.
Looking for old, rare, auto light bulb tins