Abstract: A reel mechanism for a gaming machine comprising a support which carries a motor, a reel, a lamp and an optical device. The motor carries the reel and the reel support. The reel includes a reel strip provided with symbols to be illuminated by the lamp. The reel support is provided with a tab to be sensed by the optical device. The lamp is adjustably movable relatively to the support; characterized in that the optical device, and preferably the motor, are also adjustably movable in unison with the lamp relative to the support.