Wrigley Field Folding Chairs

Back in the mid 1980s I saw in the Chicago Tribune classified that a guy was selling chairs from Wrigley Field so I went and took a look and ending up buying them (3). I did not expect just some old green folding chairs and the guy wasn't home, but his wife swore they were from Wrigley (he lived in Wrigleyville). They were cheap and this was way before collecting stuff like this was a big deal. I would say, since these are almost all wood and by the styling, they are from the 30s or 40s. Maybe made during the war when metal was scarce. They have the original green paint it appears. Can anybody tell if these are from Wrigley?