series of my

[yiannisdimgr1]

Hi, I wanted to know the exact product series of my  vaio. It seems VPCCW7S1E but i don't know how i could know its model series (IS VPCCW7S1E /W VPCCW7S1E/B ?)

HOW I FIND IT ? WHAT IS THE MEANING OF THE LAST LETTER? (/W ,/B ....)