The 604A printers comparative ruler is a two-sided ruler available in a 24" length only. The front has inches (16ths) on both edges and a line scale with markings from hairline to 2-point on the left end. A US point conversion table is on the right side of the front. On the back is pica/half pica increments on top, inch (16ths) increments and an agate line scale on the bottom. A point scale from 0-84 points is on the left end of the back.
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