@S0nic
It has been opened, see sticker on the back. The gap between the top and bottom shells is visible.
Keyboard layout is Italian, so the manuals would be in either Italian (if made in that language) or English.
It may be the lighting, but some keys seem lower than others. Check the springs underneath.
Documentation could match KS 1.3 or KS 2.04 as this version of A500 ("reduced" A500+) was sold with both.
KS 2.04 models came with "Introducing the A500 and A500+" and "Using the Amiga Workbench" IIRC (gray covers).
KS 1.3 ones should come with "A500 user's manual" and "Amiga Basic" and "Enhancer software" covering Amiga DOS 1.3 (white covers). That said, I think Amiga Basic was taken away from the Extras disk of (some?) international 1.3.3 versions, but the Amiga Basic manual was still included.