As a pin guy, I find this discussion of pins and how they were sold originally quite interesting. Does Muchinsky discuss this aspect? Here are several questions/observations for the experts out there:
1) I would guess that most pins sold at or outside stadiums throughout the years were sold originally with something attached in the way of ribbons, charms, trinkets, etc. I can actually remember seeing pins at Griffith Stadium in the 1950s that had rabbit's feet and knives attached! It's my assumption that most of the pins we see "naked" these days had lost their attachments over the years.
2) I doubt if vendors would have been going to the trouble of attaching things to naked pins, I suspect they would have bought them one way or the other and sold them as is.
3) I love the picture of the Yankees pins. Anybody else have photos of vendor or stadium displays? How about yearbooks, where there would be a page of concession items sometimes? Here's a link to a stand of "1924 Pennant Winners" pins sold outside of Griffith Stadium during the series. I think the baseballs might have been candy containers.
http://rmyauctions.com/lot-937.aspx
Here's another picture of this pin as auctioned, but I'm not sure if the ribbon and charm are original.