I'm pretty sure the Betsy Ross is fairly valuable, especially if the entire case comes with it. Condition means a lot, and it looks as if yours is in great condition.
Happy Mother's Day!
Edit: Okay, looked up the Betsy Ross on eBay in "completed sales" and they have sold for $15 to $60 -- not as pricey as I thought, but darned cute!
A similar Casige sold for $55 on eBay.