Very high quality blades, made in a few different configurations... mirror finish, satin, nickel plated, round point, square point. Also an SS model -- Silver Steel? Stainless Steel? No one seems to know for sure. The steel in the Pyramids is HARD - can be a tough hone, but shave nicely and hold an edge well.
Historical link here --
Dun's review - R.G. Dun & Company - Google Books
I love the Pyramid razors, they come from NY, the land of great razors. Don't even get me started.