Jack and the Beanstalk. Net Entertainment slot on Vera&John.
Only 0.20 euro spins, since I was getting kinda low on cash. (I wish I didn't go down from 0.80 just 50 or so spins ago).
This was the very first time I've seen the golden harp. I've been playing this game almost non-stop since release, and oh my, what a nice view when they first hit!
(Edit: The total outcome from that 0.20 wager free spins was ~170 euros, 850x bet)