Was looking into the below jumper that we wore away to Geelong in 2012, it's our 2009-10 AFL home jumper and is the first occasion of us wearing a black jumper in the VFL. Looking closer at the pics there's AFL logos on the numbers and the patches have been stuck over the top of other logos, further some players took the field in different numbers with McNamara's #50 the highest used. It's seems we've dug out some old jumpers and converted them for the match, putting players into jumpers that fit rather than wearing their usual numbers.
Brunswick Football Club was formed in 1865 and joined the VFA in the 1897 season. The club was colloquially known in its early days as the Pottery Workers or the Brickfielders, and its fans were known for sounding clayhole bells at matches; after changing their colours from light blue and red colors to black and white, they became informally, and then later formally, known as the Magpies. They struggled to be competitive in the league early on, finishing last in 1898, 1899 and 1902.
Those entries from The Footballer from 1875 and 1877 are good, but these are pictures of clubs jumpers while they where part of the Victorian Football Association (VFA)/Victorian Football League (VFL). Brunswick wasn't part of the VFA until 1897, so these were uniforms worn before they where a VFA club.