vintage

Hi all - thx for all the views in the What's Cooking gallery. Anyone have info on knives that read Breswick or Bresduck on the logo? Sounds ridiculous but not come up on searches and labels but not sure if the engraving rubbed off and they look similar. Often they are claiming to be types of...

How can you tell if this or any other is a "K Sabatier"? What are the telltale signs and is the authentic types of marking? Thanks again!