The lady in the framed 1930's advertisement (love the fancy face wood!) is wearing tees on her shirt pocket. This clip-on tee holder comes with six metal tees and could be also worn on a shirt pocket. The back side of the holder has a metal clip on each end, as show in an accompanying image.
Circa 1930 metal tees like these are quite desirable as they were a relative flash in the pan. They were tried and then abandoned due to the damage the would cause to the wood faces.