Nice digs! Wheela, the rushs is a pretty common bitters to see for sale, they range 30-40 in excellent condition. That said try digging one! Not to easy...
Somewhere between 1870-1890, I've seen both applied and tooled lips, with some rare color variants too. I wish you luck in digging one, I just didn't want to take away from lightfootes find by saying they are easy to come across... It's difficult to dig most bitters!