If you want to talk about priceless, this vintage New York City subway public service announcement is absolutely everything right about now.

In this late 1970s PSA entitled Let's Clean Up New York, one New Yorker is seen throwing a piece of garbage on a subway car floor-- much to the dismay of other riders.

[anad]

Moral of the story? If you want to clean up these subways, give your fellow littering straphangers "the look." (We guess that could work, but is anyone really willing to try nowadays?)

And here we are, thinking proper subway etiquette is something the MTA just recently started talking about!

Want to see more old school NYC? Check Out These Vintage Subway Shots from 1980.

[via NY Daily News]