All my safety razors belonged to my Dad first. They're all Gillettes. The older Super Speed comes from 1948 to 1950. It has the notched center bar. But the one I prefer is from 1967...or so I thought. I double checked today. It has a K, so it's from 1965. So I wasn't one when it was made, I wasn't even a thought, yet (except in the mind of God...He knows all). So my favorite of the bunch is older than I am. (I also have from Dad two adjustables that I have not dated and a Gem SE.)