I asked some knowledgeable friends. :-)
It's a Ferrari 512 BB in 'sorta' 1/24th from Marui. One of four cars in this series, others are Lambo Jota, Countach and Pantera.
A mini-review:
Marui's BB is one of the better BB kits, but has some flaws that you'd
expect from an old kit. The top engine piece has delicate details, and
the separate carburetors have adequate height, unlike the similarly
designed Nitto/ESCI kit, which has poor engine details. Headlights and
doors are separate, so it might be tricky to properly align those
parts. The engine cover has ventilation louvers, which is one of the
visual differences between 365 and 512, but the shape of the engine
cover itself is of the 365, i.e. the side panel lines run straight
down, and the rear overhang is more sharply tapered than the 512BB's.
Interior is another weak point. Although the dashboard and seats look
okay, and seatbelt hardwares are included, the bulkhead is moved way
too forward to accept two batteries. Luckily, BB's bulkhead is a
combination of flat surfaces, so all you need is a sheet of styrene.
(thanks to Hiroaki Fukuda)