The most westerly bunker in Fremantle Drive, Stirling - it looks to me like one of the relocated bunkers as it has a new concrete base which sits several cms below the level of what appears to be signs of an earlier concrete base.
Bunker outside former Holder High (now Meals on Wheels) seems to be a recently relocated one - nicely positioned so the direction of the opening points towards on-coming buses. Has an enlarged concrete base etc