Features:

• Graduations are all metric except for the width of the legs, which are 1-inch wide.
• The 1cm division lines are traced and extended across the photographic print to grid an image.
• Measurements within the image are then made relative to these inscribed 1cm grid lines to compensate for any distortion resulting from non-parallelism between the film and the object planes.
• Alternating black and white bars 1cm permit measurements from grossly over- and under-exposed photographs.
• Scale has become the standard for bitemark measurement and photography.