No where on that bottle does it say rhum agricole. If it did say rhum agricole it would have the AOC mark.
But this rum was not labeled to deceive you, or anyone else. It is what it says it is. Dark Rum.
This particular rum was bottled by Dillon in Martinique and is a caramel-colored spirit which doesn't claim to be rhum agricole. After an expensive marketing study on the US market and why Martinique wasn't selling any rhum agricole in the US, it was concluded that Americans drink dark rum Rhum Agricole Vieux was too expensive for the American market.So, Dillon made that rum for the American market, hence the name Dark Rum. It was introduced to the US by Heaven Hill in Kentucky, who realized that it was a mistake after they brought in the original shipment. To my knowledge there was only one shipment made.
That rum is one of the reasons that it took years for American spirits buyers to even look at another bottle of Martinique rum.
According to the people who made it, it isn't very good by the standards of rhum agricole or dark rum. Hence the cheap price today. But, if you're looking for a piece of history you owe it to yourself to put a bottle on your shelf.