I see lots of other devices listed in the 'old releases' section but nothing with clip zip in the file name. The version I have on my Zip is definitely from 2012 because that's when I purchased the device and shortly after installed RB. In 'System\Rockbox info' the version displayed is 9f2ee2f-120328.
I recently did a clean install of 3.13 but experienced a couple of lock-ups that required a hard reset - something I have never seen before on the Zip.
It's not a problem because I kept the RB files from 2012, I'm just intrigued as to why they're not in the old releases section.
Thanks!