Vintage Bituminous Concrete Calculator slide rule used for estimating asphalt/bituminous concrete quantities and weight calculations. Marked for Standard Bitulithic Company of Newark, New Jersey and manufactured by Gerson Co., Malden, Massachusetts.

Features multiple calculation scales for length, width, thickness, density correction, and weight tons. Interesting industrial engineering collectible with strong mid-century construction industry appeal.

Approximate Measurements:

• Length: about 10 inches

Vintage pre-owned condition. Shows age-related discoloration, light staining, and surface wear from normal use and storage. No original box included
From a smoke free home with fast shipping

Industrial Decor, Engineering Memorabilia, Mid Century Office, Construction Industry, Vintage Drafting Tools, Asphalt Paving Memorabilia, Civil Engineering Collectible, Slide Rule Calculator, Retro Industrial, Workshop Decor, Utility Core, Americana Industrial