Found mine at an Antique store, complete in it's original box. The original blade was dull so I used a Gem Blue Star blade. That razor gave me one of the closest shaves of my life. It is a nice addition to my micromatic.
On the first run I had a very good SE shave with a new GEM SS blade. This is a very well built piece of kit; the Twins have been in the cutlery business for a while. As Eric notes, very audible .. No cuts, I like it!
I marked down price as I bought it, you might be able to do better ($45).
If you like the Gem open comb micromatic you will love the Henckels. It takes a modern SE razor blade, thank goodness. My first shave with a new razor is never my best, but I managed a DFS. Second was BBS. It is very audible, sounding off when at it's best angle. You'll like it's crispness.