Vintage DE Blade Use

My wife picked me up some vintage new double edge blades.  I put one in my Muhle Rytmo and lathered up. Half a stroke told me this blade was bad. Tried 2 more and they were harsh as well. I don't think I will try vintage blades again. 

These were not stainless so maybe that is a factor in how dull they felt. I never heard of the brand before. Maybe they sucked back in 1950 also

I've never heard of them. Do you think that perhaps they were industrial blades and not made for shaving?

I've never heard of them. Do you think that perhaps they were industrial blades and not made for shaving?

"Sturdy" in the name is a big clue I think!! Ha! Seriously, before the advent of blade coatings & sputtering DE shaving was a chore at best. I have used old carbon blades & they were a "use once & toss" proposition.

Before the advent of SS blades the CS blades of the day would micro rust from atmospheric moisture. The vintage blades that you tried lost their edge for shaving decades ago. It might be invisible to the naked eye, but the edge is gone.