Bought quite a few of these collectible single wrapped Razors Blades at an Estate Sale.  If interested in others, please check out my listings.  This is “Star Double Edge Razor Blade - From the American Safety Razor Corp Star Division - Double Edge Razor Blade made by 6NX Process - Made in the USA.   One blade Individually Wrapped with open in the back wrapper.   Both Blade edges are very sharp and good condition for age.  Perfect for Collectors or for those interested in vintage Shaving Memorabilia.  Please see photos for style and condition.