The blue Diamond is a good razor. Norvell Shapleigh had them made but originally I think all their razor's came from Germany. The Marke Birko was made in Germany. Here is another like it on here:

http://straightrazorpalace.com/razor...tml#post431263

http://straightrazorpalace.com/begin...tml#post306500

The Robeson ShurEdge is a good razor. They were around from 1922-1940 but The Robeson Cutlery Co. Elmira, NY was around from 1893, then there's more info about Robeson Cutlery Co. USA from 1896-1922. My book says they were founded in 1893 as Robeson Cutlery Co.& were an import & jobbing firm in Elmira, NY. They moved to Rochester in 1894 & in 1896 leased the cutlry wrks in Camillus, NY until operations ceased. Robeson then began manufacturing cutlery in Perry, NY. In 1917 they opened a plant in Mount Morris, NY & in 1922 they merged with Rochester Stamping Corporation to form Robeson Rochester Corporation. In 1957 Rochester purchased Kinfolks Cutlery Company of Little Valley, NY which was another good razor firm. Robeson closed the Little Valley plant & made hunting & pocket knives with the Kinfolks trademark until it was discontinued in 1965. In 1965 he Federal Cutlery Inc. purchased Robeson & made it a subsidiary. The Ontario Knife Company acquired Robeson around 1974 & used that marking until 1977. There are a few patterns now being produced by Queen Cutlery, which is the sister company to The Ontario Knife Company. The sales & service are located at the The Ontario Knife factory in Franklinville, NY. Robeson was considered one of the best knife makers in the world in the 1920's. Pocket Ease, Shuredge & Masre Craft are trademarks used by Robeson.