Not many, they date between about 1890 til 1900, Crowder & Lechford where one of those company's who used a massive range of different bottles at the same time, nice set of bottles there [] .
I am originally from Geraldton WA, so if you find any Geraldton bottles, give me a yell. Even though I now live in QLD I am actively pursuing Gero bottles and would be keen to talk turkey with you.