NuVigor Watch Mainspring Catalog & Guide - reprint

NuVigor Watch Mainspring Catalog & Guide covering the complete array of mainsprings distributed by B. Jadow Inc from sometime in the late 1940's or early 1950's, reprint. While a short guide it is still an exceedingly handy guide for the watchmaker and is also a pretty nice reprint of the catalog that is 8 1/2 x 11 and 12 pages long + TOC. Images do a suitable job of representing the item.