The oversized T3 Turkey Red baseball cards were issued in 1911.
Notes on verification
Multiple independent sources (PSA, Baseball Cards Wiki, AllVintageCards) confirm the T3 Turkey Red cards were distributed 1910-1911 and are commonly catalogued as the '1911 T3 Turkey Red' set, corroborating the claim with minor nuance about the exact start year. [tier=bronze indep_score=0.3 clusters=3 claim_tier=everyday]
Sources
- Would Baseball have Become America's National Pastime Without ... (seed:culture_and_philosophy)
- https://www.psacard.com/cardfacts/baseball-cards/1911-t3-turkey-red-cabinets/123 (corroboration)
- https://baseballcards.fandom.com/wiki/1910-1911_Turkey_Red_T3 (corroboration)
- https://allvintagecards.com/t3-turkey-reds/ (corroboration)