All examples found in comics in the newspaper are here!
The narration box often labels items in Dick Tracy that don't need to be described. After 90 years it's still informing readers of his watch-phone, and in 2009 it helpfully pointed out that a game of solitaire was indeed solitaire. (The game had nothing to do with the plot, naturally.)
MAD Magazine once parodied this with a label labelled "label."
In The Far Side a man has painted obvious Expo Labels on everything such as "My Shirt," "The House," "The Cat" and is saying "That should clear things up around here!"