I'm sorry to interfere, but the puzzle car is a regular production model, nothing to do with a prototype
1) It is a second series Volvo 262 C Bertone from 1979.
Can be distinguished from other models by the front spoiler and other small details. (and on its colour, sharing with the third and last facelift)
2) I have attached photos of the Coggiola prototype. This is the only one Coggiola-prototype
3) The design is by Jan Wilsgaard