C-Thru Graphic Arts Ruler
Description:
A 2 x 18" opaque laminated ruler with inches, picas and agate calibrations, plus a variety of other data including proof readers' symbols, printer rules (hairline to 12 point), ten percentage screens ranging from 10% to solid, halftone screens, and a simplified copy casting system. Twelve point standard and and ten point elite typewriter copy counters are also offered.
