[911kiwi]

My friend has just found a 1983 911SC Cabriolet with a factory hard top! White exterior with black metal hardtop, glass windows & electric defroster on rear window.
I didn't even realise that Porsche made a hard top for 911s back then.
The entire folding top mechanism has been removed to install this - to the best of the current owner's knowledge, it came from the factory this way, originally delivered new to Japan in left hand drive.
The hard top has a "Porsche Genuine Part" sticker and number attached to it.
Does anyone know more about this option? What is a car like this worth? The owner is thinking of selling?
Any info appreciated.