Don't know why Karmann would have decided they had to have just different arms and lenses.Strange.
But it's just one of those little differences on the 'vert.
They are rare,i've only actually seen two sets in person.
The lenses are paper thin and are a single sheet,not moulded to give them strength, i mean the thinest plastic i think it would be possible to make.It becomes very brittle. 1fy2.jpg You have insufficient rights to see the content.