50-500m.
The panels,,,, that depends on ownership. For other people's gun, they are mixmaster. For my gun, of course it's "factory error"

Just a joke. Panel numbering style being correct, full s/n for this variation, plus an extra letter. Another instance is in my hand, 433230, the extra letter on panel is "X". Myth. On a LRH made almost 20 years early, the letter was "K". Myth.
This stock was sanded in the past. Too smooth. Came separately a few years ago.