I'd be interested to know how you would mark bronze in Australia,
The Australian standard says I can mark it as follows :-
That's it, no percentages... which suits me fine as I like to keep a
few secret recipes
If, however, I chose to make a fine silver and 90/10 bronze Mokume,
I could mark it like this :-
999 Cu Sn
Of course the 999 would have an oval around it denoting silver. If
there was a layer of 9k gold :-
375 999 Cu Sn
Again you would have the gold symbol and silver symbol around their
The order of precedence is the more valuable metal comes first.
Which is a minor problem at the moment with platinum being a lesser
value than gold.
Regards Charles A.