What does it mean if there is no version model?
Is it normal? I expect the money year after the words "MacBook Air" similar to this.
I would like to buy this particular Mac, should I worry about it?
What does it mean if there is no version model?
Is it normal? I expect the money year after the words "MacBook Air" similar to this.
I would like to buy this particular Mac, should I worry about it?
It's not normal, but it might be nothing. The next reinstall of the OS or an update might populate that field for you.
As far as I can tell, some time during installation the OS checks with Apple and downloads a localized string to represent the hardware. Since you're not US - perhaps there was an outage or an error localizing the string.
Unless there's other cause for concern - you could try reinstalling the OS - choose US location and language to see if that's related. Try looking up the serial number using the answer of the last link (The Stack Overflow question).
http://support-sp.apple.com/sp/product?cc=G940&lang=en_US
In your case, that's reported as a MacBook Air (13-inch, Early 2015) and you could change the language code to get a localized version.
Some other reading on serial numbers and the OS:
Did I understand correctly that you want the Mac Model identifier? It is found in the hardware overview. That is one levelbdown from your image.