13-1/2"x12-1/2" Aluminum L-Square. Allows simultaneous measuring of height and width while assuring squareness of type,art,photo,ect. Provides 12 common printer's scales and a proportion scale for reductions and enlargements. Calibrations: | Long arm - | Side 1: Inches in 32nds, 16ths; proportion scale.
Side 2: Pica typewriter, elite typewriter, inches, in 10ths, inches in 12ths. | | Short arm - | Side 1: Inches in 32nds, L6ths; 6 point, picas, half-picas, typewriter lines.
Side 2: Agates, 8 point, 10 point, | Each arm calibrated on two edges, two sides. |
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