What are the Amazon Kindle user agent strings?

Question

What are the valid Amazon Kindle user agent strings?

Are they different for each kindling model?

Update: just got this from the new wi-fi only to kindle:

Mozilla / 5.0 (Linux; U; en-US) AppleWebKit / 528.5 + (KHTML, e.g. Gecko, Safari / 528.5 +) Version /4.0 Kindle / 3.0 (screen 600x800, rotate)

Answer 1

From Marco Arment :

Mozilla / 4.0 (compatible; Linux 2.6.10) NetFront / 3.3 Kindle / 1.0 (screen 600x800)

Of the other studies, Amazon increases the version number Kindle/n.0depending on the version of the Kindle (i.e. Kindle 2 is Kindle/2.0).

Edit

Device Atlas UA :

Mozilla/4.0 (; Linux 2.6.10) NetFront/3.4 Kindle/1.0 ( 600x800)

Mozilla/4.0 (; Linux 2.6.22). NetFront/3.4 Kindle/2.0 ( 600x800)