Switch installation at Boyle Manufacturing Co., Southern California, 1931

4 photographs of electrical panels at Boyle Manufacturing Co., Southern California, 1931. "Subject: Switch Installation at Boyle M[a]n[u]f[acturin]g Co.

193112504DW19310219125DW1931021912504Control boards Electrical engineeringBoyle Manufacturing Co. Diamond D ElectricMcCartyDickCassidy