There are 3 Robert Harmon trading cards tracked on HobbyCardIndex, spanning Baseball. The most valuable is the Robert Harmon at $29.25 raw.

Source: HobbyCardIndex · Updated daily · https://hobbycardindex.com/players/robert-harmon

Robert Harmon Cards

3 cards · Baseball

All Robert Harmon Cards

Robert Harmon

1912
$29.25

Robert Harmon #NNO

1910
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Robert Harmon #365

1911
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