I've seen a LeSabre, a two-door Electra, and an Invicta, but not a four-door flat-top. Speaking of which, Buick sold 66,493 Electras in 1959. Of these, only 10,491 were four-door 225 hardtop models.
The Buick Electra 225 in these photos sports the Ventiports ... but the owner says engine parts are currently stored in the trunk. We're not getting more information, but the lack of a powertrain ...