In the original post, there are two specific characteristics that identify the blades as what the shaving community call Personna Lab Blues.
First of all, the packaging indicates that the blades are "Comfort Coated". This is a rather thick coating that makes the blades very smooth on the first shave, but also somewhat "dull" if you happen to have a tough beard. As this coating wears off, the blades become less smooth and much sharper.
Second, the blades are marked "Made in USA". The only razor blade manufacturer left in the USA is Accu Tech Blades in Verona VA. This facility began its life as American Safety Razor and was once the Personna industrial blade division. When Edgewell purchased Personna, the industrial blade division was spun off as Accu Tech Blades, but it retained the rights to produce blades for laboratory, medical, and industrial use using the Personna name. These blades are used in laboratories, hospitals, taylor shops, carpet shops, etc. Accu Tech Blades also produces GEM single edge blades and a variety of blades for scrapers, razor knives, hobby knives, hair shapers, scapels, etc.
Until a year of so ago, Personna blades were also manufactured in Israeli. These were fondly known as Israeli Reds, but they were sold in blue packaging in the UK and sometimes under generic store brands. These blades were labeled both as Personna Platinum and Personna Platinum Chrome. Although you might still find some of the Israeli blades for sale, they are now being manufactured in Germany, probably in the Edgewell factory that also produces Wilkinson Sword Classic blades. I have used some of the newer German made blades and find them to be essentially identical to those made in Israel. These blades do not have the thick "comfort coating" used on the Lab Blues. I find that they start sharp and stay sharp, but they are not as smooth on the first shave. Because I have a tough beard, I prefer the Platinum Chrome blades to the Lab Blues, at least for the 1st shave.
There is also a DE blade called Crystal Platinum Super+ that was formerly made in Israel. They are sometimes called Israeli Personnas. The design dates back to a USA patent issued in 1963, so it is one of the earliest coated stainless designs. The Israeli blades are still being sold, but I do not know if production has been moved to Germany or whether they have been discontinued. I have not read anything about them in quite some time.