Ed, tombac is a brass based alloy with copper and zinc content.
Depending on how much copper you may see a brassy to a reddish brass looking base metal peeking through the paint.
It will not attract a magnet.
A zinc alloy badge will not attract a magnet either. But will appear as grey metal.
Steel badges of course are magnetic.
The pin on your wound badge is either tombac or plated steel.
--dj--Joe
