to what few people were still spending money. In December 1932, the Northwestern Mutual Fire Association, the nation's biggest fire insurance company at the time, signed a ten-year lease with the Gottstein Estate for the majority of the vacated space in the building and renamed it the Northwestern Mutual Insurance Building. In February 1933, following $40,000 in renovations including remodeling the lobby and the addition of a new scientific sprinkler system, the company moved their offices from the Central Building in the financial district to the former shopping tower where they would occupy the basement, 2nd, 3rd, 10th, 11th and 12th floors. Remaining retail tenants occupying the basement and second floors were forced to vacate. The original plans for the building had called for a mast consisting of a ten foot copper base on a concrete pedestal holding a tall pole surmounted by a zinc ball 16-inches in diameter. A mast wasn't built until 1937 and of a heavier design than originally intended. From late 1939 to early 1940, the spire was used as a light-up "thermometer" to gauge the progress of Seattle's Community Campaign fund. The lighting was divided into six sections each representing $100,000 donated to the fund and another section would light up each time a goal was met. The airway beacon at the top represented the final goal. In 1971 the mast was removed due to maintenance problems. In late 1939, Northwest Mutual commissioned the building's original architect, Henry Bittman, to design a expansion to the building's third floor for the insurance company's use that would blend in with the original design. Another major expansion in 1941 was completed to accommodate district offices of the Richfield Oil Corporation. During this expansion the tower was expanded west to the alley. In 1943, the entire second floor was taken over by the Induction Center of Western Washington for Men which handled Selective Service during World War II. In the 1950s, a remodel occurred which removed most of the decorative features of the lobby including the ornamental bronze elevator doors. The lobby was also made smaller by additional retail space. Olympic Tower and later years In 1974, Northwestern Mutual became the Unigard Insurance Group and moved most of their offices to the recently completed Financial Center at Fourth and Seneca Streets but retained a small office in the building until 1976. Following Unigard's departure, the building was briefly retitled