Something else that surprises me is how few of the "key" issues legendary comic fandom pioneers Don and Maggie Thompson had. No Flash 105, no Showcase 4, 8, 13, 22 or even 34, no Brave and the Bold 28 or even 34 and no Fantastic Four 1 and 2. I thought they were very early collectors of Silver Age comics but pre-1962 I see only Green Lantern 1 and Flash 123.
I'm just guessing here. Maybe they sold those books before the days of CGC and the provenance was lost. (I think that's the first time I ever typed the word "provenance"!)