Offered here is the scarce 1902 F&J Smith Champions of Sport Harry Vardon (blue back) card. This card has a total pop of only 7. This is a PSA 4 which is a Pop 2 with only a single example ever grading higher (there is a lone PSA 5 that is graded highest).
If collectors eventually turn their attention to early golf cards, expect low pop cards of Harry Vardon to dramatically increase in value. Harry Vardon was one of the greatest golfers in history, and his early golf cards were produced in tiny quantities.