ᐅ Effect lamp IKEA four years old. How to replace the halogen bulb?

I have here a, hmm… I assume this is the predecessor model of the Isbrytare. It is an effect lamp, a spotlight with interchangeable metal discs and a movable magnifying glass arranged to project effects onto the wall. It is no longer manufactured... My question is, since I haven’t connected it for 2 years, how on earth do you change the halogen bulb? I hope someone can help me...