the junior and provided him with a number one Port Adelaide guernsey. Since 1924, there have been few exceptions to the tradition. The most notable exception was Geof Motley, who followed the captaincy of Fos Williams. Following his appointment as captain-coach, Motley elected to continue wearing the number 17, and continued to do so for the remainder of his career. When Motley handed the captaincy to John Cahill in 1967, at the insistence of coach Fos Williams, the tradition of Port Adelaide captains wearing the number one guernsey resumed. When co-captains were appointed for the 2019 season the No. 1 guernsey was temporarily retired. It was re-instated the following season when the club returned to appointing a single captain. Number panel The white number panel on the back of the Port Adelaide guernsey originates from the first decade of the twentieth century when club secretary James Hodge took the club across Australia to play matches against interstate teams. During the early 1900s, it was commonplace that touring teams would wear numbers, allowing spectators to identify unknown footballers. Port Adelaide attached a white square to the back of its guernsey, with black numbers to be printed on the square. This design would continue to be used after the introduction of numbers into the SANFL, and was interchangeably with a black square and white numbers. The design bearing the black square eventually became the design of choice until 1928. The club introduced a 'permanent' white panel for the 1928 season, which would remain until the club was forced to merge with West Torrens during WWII. The club reintroduced the panel in 1953 and has since continuously used it in the SANFL. The panel was also present on the club's AFL guernsey until it was phased out in 2009. The number panel returned to the club's guernsey in 2017. The white panel is also intended to resemble the white back of a local Magpie species that is present on the badge of South Australia. 'Prison Bar' guernsey Historically, the black and white 'Prison Bar' guernsey, alternatively and historically known as the Wharf Pylon guernsey, has been Port Adelaide's most iconic guernsey design. The club first adopted the guernsey in the 1902 season, after having difficulty finding magenta and blue dyes that could repeatedly last the rigours of an Australian rules football match. The guernsey was designed to be a literal depiction of the