Sidchrome Was an Aussie owned co.

There's not a lot of Aussie stuff available anymore, well not worth sending OS unless you are a mad keen collector. Not even sure if Sidchrome is still made here or offshore, their wrenches/spanners now look just like the gear available for half the price
I'm a big Sidchrome fan, the local stuff is good and there are differences in design from era to era. Between Dads collection and what I've found in sales I think I have one of everything. They don't seem to have produced the range of gear that snap on have.
The dawn vices as 2oolhound says are ****** good and have come in a range of styles and duty ratings. I've owned Dawns from 2" up tp 6" quick release.
We had a co named Litchfield who made specialist auto tools for trade and manufacture. Their plant was not far from GM Holden in Adelaide South Australia. Litchfield gear has a very utilitarian/military feel to it and a handle knurl I can spot clear across a swap meet stall.
For true Aussie Sidchrome I think you need to find something from the 1980's. My apprentice ratchet set from 1983 proudly states "made in Australia" and "unconditionally guaranteed". No such boast on my set bought in 2001.