u/AV-WS

No, unfortunately I can't see the edge without opening the pack

Got you, thanks tor sharing your experience! What is your favorite blade?

'60-70s seem to be a good estimation. Other blades from the lot are from that period. Is it possible that Personna used the Gillette's patent at that time?

Thanks LittleCooties! Nice idea wutshoes! Here's what I found:

U.S. Patent No. 3,071,856 is for a "Razor blade and method of making same," granted on January 8, 1963, to inventor Irwin W. Fischbein.  This patent is historically significant because it introduced the world to fluorocarbon-coated razor blades—most notably using polytetrafluoroethylene (PTFE), commonly known by the brand name Teflon.

Before this patent, shaving was often a painful daily chore. Fischbein was a researcher for Gillette, and his work led to the release of the Gillette Super Stainless (and later "platinum-plus") blades. This technology set the modern standard for almost all disposable and cartridge razor blades used today.

Good😀And I'd really suggest you to try a mild DE razor first. King C Gillette for example. If you never tried it before

If you like the Rockwell feel but hate the plates, the Rockwell T2 is the obvious (though slightly pricier) answer. It’s their twist-to-open model. If that’s too much cash, look at a Viking’s Blade Chieftain. It’s basically the "premium" version of your pharmacy razor—same mechanism, but way better weight and balance.

Did you try the Double Edge ors Single edge razors? Or you wanna go straight from cartridge to a straight razor? The gap between cartridge and straight razor is huge, but there are several intermediate steps like DE/Se razors or shavets which can make the transition more enjoyable

It's written on the package in Turkish: made in China. Never saw greens from China though