A vintage-looking Mantle or Ruth card is not necessarily an original. Check dimensions, stock, printing characteristics and known reprint markings; avoid aggressive cleaning or trimming. Expensive cards deserve an independent review.
Join the discussion: What signs do you check before buying an ungraded vintage baseball card?
Share exact card details and dated, verifiable sold results when discussing values. This is a community discussion, not a guarantee of authenticity, grading outcome or future prices.