Factory issue
The message was printed mechanically on a piece of fabric sewn into the inside lining of the crotch. You can't see it when the fly is closed, and you can't miss it when the fly is open.
The Orrery
The message was printed mechanically on a piece of fabric sewn into the inside lining of the crotch. You can't see it when the fly is closed, and you can't miss it when the fly is open.