Pittsburgh Instrument and Machine Co: Pittsburgh, nd. Item #97-6864
Illustr, 9 x 6, stapled wraps, 48 pp. Covers moderately worn, creased, soiling, lacking tips of two corners, staples rusty, text block detached from one (of two) staples, contents have light creasing else good. Triangles, plumb rules, instruments of precision, engineer's dumpy level.