There are 12 of them worldwide. So, yeah, it's probably somewhat rare. Mine was the first ever made.
The ever elusive Solingen razors. Given how they were produced, chances are, this is really rare. Because it is reasonably safe to presume that they were made "on the side" by razormakers otherwise working for the big brand names during a lull in razor demand. There are quite a few of them around, each comparatively rare.