http://d-m.cocolog-nifty.com/blog/20...7313_cca0.html
That page says SVWC-7201 was the original version with Label Gate copy protection, and afterwards it was replaced with SVWC-7313 with the copy protection removed.
More information here:
http://www.theregister.co.uk/2004/10...py-control_cd/
So there could be more releases that have had their numbers changed.