Ah, the title of this blog is a trick question.  One can never have enough of the original factory maroon binders!
Below are some photos I have taken from one I just bought from Tom Nelson through the 356 Registry Classifieds Section.  As you can tell, it cleaned up very nicely.
Thanks Tom!
In the bookshelf picture, it is the one next to the Carrera manual.

If you enjoy originality, sometimes it gets down to very small details.  I am an "originality freak", and these details are often something that others cannot see, and couldn't care less if they did notice.  Probably comes down to the fact that I personally enjoy the details of the car, and don't need others to have the same appreciation for these details.  

Below is a photo of some tire valve stem caps.  These are fun because of what it says on the cap.  "ALLIGARO GERMANY" is visible, but only if you have great lighting and fantastic vision.  Really almost need a magnifying glass to read.  I think you can make it out in the photo below.   Alligaro was a German manufacturer of tubes for tires.

Again, no one looking at my car will ever notice, or care, but for me personally, a fun little detail. ​

Ed Leed sent the following information:
When I googled Alligaro, the results show Alligator a tire valve company in Germany. The company history section of the website confirms that they used the Alligaro name until 1964 when they changed it to Alligator, which still is in business today.
So, your Alligaro caps pre-date 1964.
I am curious why they changed the name. Perhaps because their valves snapped closed, as mentioned in their product description.

I have looked for an original Porsche umbrella for a very very long time.  A while back I found one that is/was early 911 era vintage, and posted about it here in my blog.  It is an awesome umbrella, but not from the 356 period.
There was a version sold during 356 production that had handles that could fold down to form a seat.  This design was used by Ferry Porsche himself, as his legs would get tired at the race track.
Photos of Ferry with the umbrella shown below.
Below the Ferry Porsche photos, is my umbrella.  So happy to have this in the collection.
Guess I should sell the early 911 era one.

Here is mine-- just like shown above!!!