ERTL / ESCI 1/24 BWW M1 (Procar competition version) in Marlboro livery.
Much more detailed kit than I'd expected, with an engine and decent suspension, should be buildable as a really nice piece.
Missing one clear quarter window, which isn't bad for having been rattling around unsealed for decades, and bizarrely the instructions, though clearly correct for the kit, state it's 1/48.