The Wigan coat of arms is interesting.
Wigan FC used the Borough's one , 'Ancient and Loyal' which came in I think in 1928
Wigan Boroughs original crest was the wiggin tree, used by the Latics in the 70s.
Wigan changed to 'Progress With Unity' in 1974, which was the Wigan Met crest, but it included Leigh in that, so the pie eaters dropped it later and reverted to the ancient and loyal one again.