These were being handed out at UNSW with razors so checked and not unique.
Decent code for $5 off any blades until end of April - nice long expiry. Could make for some nice deals (however for the more expensive blades I've found Shaver Shop to consistently be cheaper than even Coles + $5 off)
Photo of other side: http://i.imgur.com/rtMp7ZD.jpg
Any minimum spend?