Swartchild Mainspring Table for Black Shield Mainsprings 60th Anniversary edition - reprint

Swartchild & Company 60th Anniversary Mainspring Table for the man at the bench. Back in these days I guess the idea of a woman at the bench was too foreign. 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 16 pages long. Images do a suitable job of representing the item.