根據官網說明，檢查序號最後三碼.... Y5N, YMU, YMV, YMX.
You can distinguish the iPod classic from the iPod (5th generation) by the last three digits of the serial number. The iPod classic serial number's last three digits will be one of the following: Y5N, YMU, YMV, and YMX.
資料來源：
http://support.apple.com/kb/ht1353
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另一網站的說明，也可參考一下.........
資料來源：
http://www.wikihow.com/Check-Your-iPod%27s-Generation
# Identify the 80GB iPod 5.5:
* An 80GB hard drive.
* Look for a very large, wide-screen color display.
* A click Wheel.
* Can display photos and videos.
* Uses USB for synching.
* Only available in black and white.
* You can distinguish the new 80 gig version from the original 5th generation by the serial number. 80 gig versions have serial numbers ending in:
o V9K
o V9P
o V9M
o V9R
o V9L
o V9N
o V9Q
o V9S
o WU9
o WUA
o WUB
o WUC
o X3N
