A catalogue and price-list of drawing instruments
A trade catalogue and price list issued by Theodore Alteneder & Sons of Philadelphia in 1892, selling drafting instruments to engineers, architects and draftsmen. Engraved line plates show protractors with graduated arcs and numerals, ruling pens, dividers and compasses with knurled screws, each isolated on blank ground — usable as precise mechanical silhouettes, dial scales and instrument line detail.
