Old 1960, mid-century vintage, GESCO (General Electric Supply Company) Estimator advertising catalog. This has 128 pages with tons of tools, industrial and commercial lighting fixtures, fans and ventilating equipment and many other electrical fixtures, fittings, parts etc. There are illustrations and photos as well as the original pricing.
We saw some great listings for Holophane lights, porcelain enamel yard and gas station lights as well as lineman's tools, industrial electrical transformers and much more!
This is in very nice vintage condition, but does have a name on the front cover.