The Screw Department

Here's another photo made for Elgin marketing purposes, in the late 1920s. This shows the screw department.

From Elgin National Watch Co

The caption reads:
MANUFACTURING 400,00 SCREWS PER DAY. The Screw Department. These automatic screw machines, designed and built by master craftsmen, are highly efficient. They make minute steel and brass screws for watches, with an average daily production of 400,000.