[Chesbro41]

Ken I own a Duffy Lewis New York Americans card that was issued in the Holsum Bread set. There are only 3 in the pop reports (1 psa/2 sgc), so it's somewhat hard to come by. I was looking at yours for a minute.

I don't believe it's a Koester as we've seen full sets of those appear over time in scrap books so I assume one would have surfaced... I also don't believe it's W575, which is kind of like the default set for graders when an uncataloged card is discovered from the era.

I believe there are some 1920-ish Bread cards like the Holsum that are out there mislabeled, and this one is an early test run/blank back. I could be wrong, but it would make sense.