First Bowman Cards Before the Auto: An Illustrated Checklist (data)
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Side-by-side card images, earlier unsigned releases, first checklist-issued autographs and visible 1st stamp checks. 2022–2026 unsigned catalog and selected earlier pairs. Reviewed September 2026. Data behind the ProspectPulse article: First Bowman Cards Before the Auto: An Illustrated Checklist. Prices come from recorded eBay sales that ProspectPulse tracks for 1st Bowman autographs. The article explains the method and its limits. Please credit ProspectPulse and link the article when you use these files.
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Zenodo创建时间：
2026-09-28
