There are slabbed 1916 quarters out in Coinland that have absolutely ZERO percentage of any of the digits showing. Those coins were slabbed based solely on 1916 diagnostics. Those dateless 1916 slabbed coins still sell for good money, too!
Your coin has character, eye-appeal, identifiable digits and a great story behind it! The "details" designation on the slab means diddly squat at this stage of the game.
It is a great find! I hope you enjoy it for many years to come!