Sorry. I don't think that is a Improperly Annealed Quarter. Looks more like Environmental Damage. I collect Improperly Annealed coins, about a dozen certified so far, and yours is not it. Worth 25C
Circulation wear and Environmental Damage. The older the coins are the uglier they get and they may seem like Improper Annealed. I also metal detect and pull out hundreds of coins that look just like both your coins. If it were what you think it is I believe someone would of noticed decades ago.