The store labeled blades just have the indicator arrows on them since they come in a plastic pack just like Personna blades and they don't idetify which Dorco blade it is. Many suspect it is the ST300/301s. The blades are made in Vietnam and they feel very sharp and smooth, maybe just a tad below the Primes. I felt that these blades were better than the Shark SS that I was prevoiusly using. Pick some up and see if they work for you!Interesting! Is there any identification on the blades or packaging that might indicate whether they are Prime Platinum blades, or is is strictly generic. Do you find the blades to be as sharp and as smooth as the Prime Platinum blades?
I ask primarily out of curiosity. I purchased 100 Prime Platinums; since I use other blades as well, they will last quite a while.