I love a mystery -- and this remains unsolved by me. If the center dot is 2mm = 1 mil, this target is intended for use at 2 meters.If the 1 to 40 scale to the left is in mils, it measures almost 50mm, 1 mil = 1.2mm, target for use at 1.2 meters.Designed for bored office workers wanting shooting practice in their cubicles?Scoring rings are bass-ackawards. Did you find this on April First?