13-1/2"x12-1/2"Printer's L-Square

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.