I am pretty sure true African geese all have the dewlap most African from Hatcheries are really Brown Chinese
African goose
The African goose is a breed of domestic goose. The African goose breed most likely originated in China, despite the name. They may possibly be related to the wild swan goose a smaller species of goose, just like their close cousin the Chinese goose. Though they share some similar characteristics, the two can be distinguished by the African's larger dewlap and different knob shape. African geese are also quite a bit heavier than Chinese, and are better known for their docile temperaments. Also, they are known to lay far fewer eggs than Chinese geese, 25-40 eggs per year for the African goose vs. 40-65, or, in extreme cases, up to 200 eggs per year for Chinese geese.

African goose
The African goose is a breed of domestic goose. The African goose breed most likely originated in China, despite the name. They may possibly be related to the wild swan goose a smaller species of goose, just like their close cousin the Chinese goose. Though they share some similar characteristics, the two can be distinguished by the African's larger dewlap and different knob shape. African geese are also quite a bit heavier than Chinese, and are better known for their docile temperaments. Also, they are known to lay far fewer eggs than Chinese geese, 25-40 eggs per year for the African goose vs. 40-65, or, in extreme cases, up to 200 eggs per year for Chinese geese.