Operators at GECO filled 13,426,587 No. 251 fuses in Building No. 67 over its tenure — the largest producer of any single fuse in Canada’s history. In this diagram, the layout of Building No. 67, Shop “C,” where 251 fuses were filled, is depicted. Building No. 67 consisted of three main shops — “A,” “B,” and “C” — with an annex attached to each shop. During the summer of 1943, staff switched Shop “C” over from English production methods to a bulk assembly production line. Each operator performed a single step in filling the fuse. The new assembly line consisted of worktables, extending almost the entire length of the shop. Courtesy of Archives of Ontario.