Do you mean the black and red diamond decals? Or the maker's mark on the bases, like this?
The leftmost is a Sommeliers from about 8 years ago, the center is a Vinum Extreme, and the end is a rather older Sommeliers (the same as the older Vinums, except the location of the gaps in the box around the JR). The decals come off with a fingernail, and residual glue with warm water, goo-gone, or pretty much any solvent. Of course the etched marks don't come off, but why should they? I rather like the script verison on the Sommeliers... Regards, Huntsman