Curious question, these don't look like typical k11 rear springs but then it has been a while since i have had a k11. These look like they belong on a macphearson strut.
http://cgi.ebay.co.uk/NISSAN-MICRA-...ryZ10424QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
http://cgi.ebay.co.uk/NISSAN-MICRA-...ryZ10424QQssPageNameZWDVWQQrdZ1QQcmdZViewItem