This medal was made for the Hudson–Fulton Celebration held in 1909. The Hudson–Fulton Celebration commemorated two separate events. The first is the discovery of the Hudson River in 1609 by Henry Hudson. The second is the first successful commercial application of the paddle steamer, the Clermont, by Robert Fulton in 1807.
The medal was designed by Emil Fuchs. Interestingly, Fuchs did not know the proper 17th century spelling of Hudson's ship and settled for "Half Maene". Modern spelling of the ship's name is "Halve Maen".
A total of 124,698 of these medals were struck in six sizes.