Grandmother's Glassware

These were given to me as a wedding present from my Husband's Aunt.
They were his Grandmother's before she passed away.

They are quite clearly made in a mold from the seams found along both sides. The diameter at the top is 3 1/4", diameter at bottom is 3", and they are 6 1/4" tall. The only markings are on the bottom. On every glass there is "W26" and on the opposing side a different single digit number.
I have searched all over trying to find some more information on when, where, and who made them but have come up empty handed.

I did find matching glasses without stems here http://www.worthpoint.com/worthopedia/green-depression-glass-tumblers-143678432, but the seller had no more information than I.

Aren't they just gorgeous, I love the style, details from top to bottom, and especially the color of the green ones.

If anyone has some information I would love it.
Thank you.