Combining this with other code from perlfaq4 (maybe just a previous version; see `perldoc -q duplicate`): 
my %seen;
for my $key ( 'Number', keys %hash) ) { 
    next if $seen{$key}++;
    my $value = $hash{$key};
    print "$key => $value\n";
}

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In reply to Re^2: Hash Order by bart
in thread Hash Order by Sporti69

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