It's a rebodied Austin Healey Sprite, originally released as the Innocenti 950 Spider, developed when Innocenti had licencing arrangements to assemble BMC stuff such as the the Austin A40 Farina and subsequently Minis, 1100s and even Allegros. They didn't think the Frogeye Sprite looked right, so commissioned a restyle by Ghia’s Tom Tjaarda who later did the Fiat 124 Spider, Ferrari 330 GT 2+2 and 365 GT California, De Tomaso Pantera and the first Ford Fiesta. Spider production started in 1961 with the coupé a late addition from 1967-68 (794 made according to other sources, rather than 487 as mentioned in the ad). A pretty thing.