When you have 5 minutes, use Google maps to search for Lithgowicon New South Wales.

Once you have found Lithgow (MA) zoom out. A bit East you will find Bathurst (BA) and then a bit further East you will fins Orange (OA)

Someone with a better grasp of history than me, explained that Lithgow was selected as the site for the Ordnance factory as it was far enough inland to be out of range of the 1900's era warships.

Bathurst and Orange, as well as Forbes, were established as feeder factories, to increase the total capacity during WW2