Physical description

Australian Porcelain Insulator Co. Ltd Factory, 1939
Four black and white photographs relating to the Australian Porcelain Insulator Co. Ltd Factory
.1) exterior view
.2) view of a 22kv line pin
.3) mechanical test m/c pulsating load 0-35,000
.4) electrical test room 120kv - 20kva test transformer test capacity. 2 tables approximately 40 feet to 10 inches per table.