Well I don't know about that - in railway terms it was the changeover point
and included customs facilities and a jail in the basement of the station
for smugglers, but the border was disputed until well after federation.
There is a story of a surveying error which to this day means that the
Vic/SA border is about 3-4km further west than the NSW/SA border - have a
look at a map. The Vics won the argument in the privy council I believe and
got the strip of land, but had it been the other way, Servie would have
been in SA. A classic case of he who shouts loudest.
This border anomaly creates another wonderful trivia question with which
you could win mega-bucks in a bar-bet.
Through what states does the Murray ruver run?
Most people would answer NSW and SA becuase they know that the Murray forms
the border between NSW and Vic, but that the river is wholly in NSW.
However, because of the above border anomaly, for about three or four km,
the Murray also forms the border between SA and Vic, and for that distance,
the border runs down the centre of the river, so the Southern half of the
river for 4 km is in Victoria.
So the correct answer is NSW, SA AND Victoria. Many people wont believe
you, but take a look at a detailed map.
Only a tenuous link to railways I'll admit, but interesting.