What you have is Winchester brass.
The letters originally stood for
Western Cartridge Company. They
were bought by Winchester, hence
the Winchester-Western (W-W) brand.
Those are 9mm NATO (circled 4 point star)
rounds manufactured in 1997.
Other U.S. makers of NATO ammo include
FC - Federal Cartridge
LC - Lake City Ordnance
Regards,
p_r
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