Gillette Super Silver blades were made from the 1970's right up to 2000. I have used a few blades from the 70's vintage and some from the mid-80's. Both were excellent blades being sharp, smooth and long lasting. Check the Mr. Razor Gillette Blade database to see if you can identify your blade. They look something like the orange packaging from 2000. The blade case is different. Hope they work for you. I would suspect they will be as good as any blade made today.