hmas-watson postcode nswdl Home ›› Postcode Finder ›› NSWDL ›› Hmas-Watson Hmas Watson local listingsThe suburb of Hmas Watson is located in NSW and has a postcode of 2030. Free hmas watson business listing! Get the first free listing in hmas watson! Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.