These unusual spy photos show a development mule running a hacked up Ferrari California body. Could this be a drop top Ferrari 599 GTB Fiorano Spider or even the mysterious Ferrari Hybrid?

Snapped in the Czech Republic by CzechFerrari (obviously), the most immediately noticeable feature is the boxed out rear window. It's that which leads them to believe a new convertible lies underneath the California body. World Car Fans goes one step further, suggesting that the unusual venting in the body indicates there's more going on underneath than just a new roof, speculating that this could be the hybrid first revealed in the Ferrari Hybrid patents. [CzechFerrari via WCF]