A Blue diamond in original box with date and providence=$30 sorry about the picture quality,it s like new,no marks =nothing,the label says Otto Bearns brooklyn NY, year 1938,he was a grinder and importer of fine cutlery-very cool,I took it so fast I made his head spin just found out that this is a Grah & Plumacher seems that they also made a black diamond which must be a little more common as there is no info on the blue diamond
