As Craig stated, extractors are the norm. Do not believe all ads. I had a seller insist that a gun was 20ga with ejectors. After several conversations he finally admitted the gun in question was 12ga with extractors. Big difference in price.

You can view various grades and get history here:
http://www.lefevercollectors.com/

The photos are very helpful:
http://www.lefevercollectors.com/index.php?p=1_18_Photos

The Lefever discussion forum.
http://lefeverforum.informe.com/index.php

I strongly recommend Robert Elliot's book "Uncle Dan Lefever Master Gunmaker".

The grade is stamped on the water table next to the serial number:


Pete