Ah HAH! Very good and close enough for a Point for you!
I think my first Puzzle here was about the 2 different body styles that BMW used on their Isetta.
The early models used the "STANDARD" until mid 1957 when it changed to the "EXPORT" style.
The "Standard" had fixed triangular windows, while the "Export" version had Sliding Windows.
both had sunroofs though.
The original Hotwheels model called WHATTADRAG had used the "STANDARD" aka: "Bubble Window" style body of the Isetta.
The scaled up version of the model used the "EXPORT" aka "Sliding Window" style body of the Isetta instead.