National (Tas.)
Referenced in several listings as a Tasmanian manufacture from 1904-1905, there appears to be no mention of this in Trove, Saward or any Tasmanian motorcycle history source.
National (NSW)
Manufactured in Baylis St, Wagga Wagga NSW around 1914 by the National Motor and Cycle works, run by a W.W Watson.
Source: Howard Tucker, Lost Wagga Wagga FB Group.
Nella 1910-1915
Nexus
A post on the FB page Australian Made Motorcycle Jamboree says these gearboxes are a direct copy of a Sturmey-Archer.
NSW
"Of the riders getting over 35 minutes' start, Featherstone, just arrived from England, is competing on a N.S.W. motor of 3 h. p."
The Sydney Morning Herald, Sat 30 Sep 1905
Two of these appeared in the South Australia registry in 1920, likely transfers or re-registrations.
16463.- R. C. G. Anderson, Mile-End. 3 (h.p.) N.S.W.
Registered SA March 1920
16489.- F. K. G. Boase, Mile-End, 3½ (h.p.) N.S.W.
Registered SA April 1920
Source: Trove NLA.
NZeta 1961-1963 (NZ)
Rarer Australian Marques