Even if the manufacturer doesn't want to do it, anyone with an etching laser can add logos, lettering etc to any MT they want.
The 0600 and 0700 are just the date the handles were made (MMYY format). Very common for them to be different on LM tools.
babola: "Enjoy your tools and don't be afraid to air your opinion and feelings here, but do it in courteous and respectable way toward others, of course."