Thread: Friedr. Herder Abr. Sohn No#

Hello everybody,
inherited what appears to be a Friedr. Herder Abr. Sohn razor from an uncle. I do not have any experience with razors and have not made any attempts of cleaning the tool yet.
Have been reading up on some other threads regarding the manufacturer, which was very interesting. In most reading have done, I have seen a # on the razor. Neither side of the blade however has any specific # or stamps. What does that mean? From the pictures attached, can anybody help me to figure out the year the razor was manufactured?
Any help is appreciated!
-Chrisl1


Case


Closed


Front


Side - neither side of the blade has any # or stamp