Looking through scans of Chicago Athletic Association stuff from the early 1900s, i kept running into this somewhat familiar looking logo. Turns out The CAA used something similar to the North Siders' logo for a solid decade or more. I happily offer you a 1906-era Chicago Athletic Association T-Shirt!
.: 100% Airlume combed and ringspun cotton (fiber content may vary for different colors)
.: Light fabric (4.2 oz/yd² (142 g/m²))
.: Retail fit
.: Tear away label
.: Runs true to size