Was in Stuttgart last week and took my son to the Porsche Factory. We saw the small museum (they are building a new bigger one too!) and went on the factory tour.
1948 356 "No. 1"
The main assembly building
A happy dad and his son
Interesting fact: Each engine is made by one assembler. The engine goes along an assembly line (instead of duplicating tools, fixtures, etc. for each assembler, the engine moves along to each station) and the person building the motor walks along with it it. How long to build a new engine? 2 hours.
A few more pics
here