George;
I also have a 20ga lefever A grade....its a nice handling gun that you really don't hear about....now you mention yours and one has just been listed in the For Sale section; all 20ga guns.....guess that's about the TOTAL production run in 20ga....
There was at least one more. If you have been reading Shooting Sportsman magazine for a while you may remember the last page regular, "The Colonel". A 20ga Lefever "A" grade was his only gun...Geo
Ooops, I promoted him. The protagonist in the series was "The Major". If you are not familiar with the articles, I have a treat for you. The series by author Galen Winter, was published by CountrySport in 2002 under the title "The Best of the Major". Find it and buy it...Geo