Badges of honor on the street
 

I think that "badges of honor" on muscle cars really took off in the 60s, but even before that you occasionally saw a trim piece on a fender or a decal under a hood that told you that you might have a long day.
If you were dumb enough to disregard the badge of honor.
http://www.mystarcollectorcar.com/3-...ain-sight.html