Given equal condition, the unstamped one will usuallu sell faster.
The unstamped one will sell to me, because they usually go for less.

I can't read any of the markings when I'm shooting them.

The stamping matters for collector guns, not for shooter grade.
I'm happy with or without the import stamp.
Prefer without, but won't kick one out of bed because of an import stamp.

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What would Jim Cirillo do?