Gary Gardner's superbly taken free-kick secured Birmingham bragging rights in the Black Country derby as they won 3-1 at home against West Brom.
In-form John Swift opened the scoring for the Baggies in the fifth minute, latching onto a Grady Diangana pass to expertly steer home from just outside the box.
Birmingham drew level from a contentious penalty, Koji Miyoshi seemingly slipping in the area next to a Cedric Kipre challenge with referee James Linnington pointing to the spot.
Juninho Bacuna stepped up and slotted home calmly before Skipper Dion Sanderson's smart header from a brilliant Cody Drameh delivery gave the Blues the lead.