Millard Filmore Robeson didn't make any junk.

Your 15L400 is "ground and honed for tough wiry beard and tender skin (requires little stropping)"

If you're interested in seeing what Robeson made and learning about the company, check out
RobesonsRme.com

The gent that owns all that steel and the website is an amigo of mine. Charlie has been collecting Robesons and Terriers for about 30 years.

Click on the STRAIGHT RAZOR tab at the top of the page and you can see a copy of Robeson's advertisements for THE RAZOR THAT FITS YOU FACE and you can look up your model number and read what type of face and dispostion it was supposed to be for. YOu can also see some beautiful Robeson and Terrier razors.