According to Armando Cortesão and Tony Campbell there are two remaining Benincasa atlases with the Cape Verde islands on them from year 1468. It's unclear which one of the two is older.
1. Benincasa, G. 1468. Owner British Library. Number 'Add. MS 6390'
2. Benincasa, G. 1468. According to Cortesão the owner is 'Principe di Trabia e Butera'. Accordering to Campbell '(H.P. Kraus)'. Information Cortesão in his 'History of Portuguese Cartography', Volume II (1971):
Atlas 2 is for sale at Christie's for an estimated price of USD 2,397,000 - 3,995,000.
Signature Benincasa and date 1468
Upper cover. Detail
Chart with Cape Verde coast and Cape Verde islands
Cape Verde islands detail
Cape Verde coast
Christie's 'Overview' of this map
Mark in the 'Provenance' that the Princes of Trabia ('Principe di Trabia') was the second owner and Kraus the fourth. The sixth owner is selling this Benincasa 1468 atlas.