Found this grouping on Monday at the base of a bridge trestle in 12' of water, also got my first painted marble on the outing, it is the banded one in the 3rd row next to the agate.
thats quite a nice little mixture there the newst to me looks about 1940s.but im no expert.keep looking there may be more.i hit an old house site with my dad about 4 times and got about 70+ marbles out of it of all ages