Looking for help identifying these three cards:

[Cozumeleno]

Looks like I'm a couple of months late to this party but I can give a little more information on these. I spoke with the seller beforehand and bought four of his - the Zack Wheat, Eddie Collins, Dickie Kerr, and Ivey Wingo.

These are definitely not Koester's since the players come from a variety of teams. In comparing them to some of my cards, the stock is virtually identical to W575-1s I have. They are not paper thin but are, as Leon mentioned, noticeably thinner than the E121s.

I believe they are from an advertising poster for two reasons. First, the seller told me he has actually seen the poster in an auction before. The description from the auction he saw listed it as a gum advertising poster but he couldn't recall the name. He THINKS it began with a 'W' but it was not Wrigleys. So if anyone can offer some other gum company names from that period, please let me know. That would aid in searches for trying to find a picture of the poster. According to him, he got these from the collection of an older gentleman's family after he stopped collecting in the 1960s.

Second, some of the cards had large black overprint letters on them, including the Collins and Wingo I purchased, similar to the overprinted N284 Buchners. He had two other cards with parts of the lettering as well and some had traces of the lettering on the backs (which are blank), meaning they were laid on top of each other while still a little wet. If they are from a poster, what it said remains a mystery. However, I believe it could be some iteration of the "Base Ball Stars of the American and National Leagues," which is what was printed on the backs of the E121s. I've got more detail I could get into with that if anyone cares but I've blabbed long enough as it is.

I've scanned in my cards below. Also attached are the other two that had letters but that I did not pursue - Strunk and Judge. If anyone has more details or information/thoughts, I would love to hear.

Finally, to the original poster, check the backs of your cards. If you have any letters showing from wet ink, please let me know. That could aid in determining the phrase that was overprinted.