This tag is simple and yet the lettering is inventive enough to be better than half of the other writers out there. If you don't know, Baltimore's made area code is, of course, 410, and so this is as universal as it gets when claiming hoods. And by leaving the piece unmarked as far as claiming the inventiveness, well, this points more to a higher understanding that concepts behind allegiance to 410 are more important than the individual's namesake.
That, or it was just some old-school b-boy high on crack who got his hand on some phat marker and felt particularly proud at the moment.
You just never know with this city (see: The Wire).