Polka dots, stripes, plaids and solids (unless they are an unusual color) are hard to date, because those have been around forever. The 4 patch with the solid brown squares and dotted squares of brown and red (?) looks 1920ish to me. In the second photo, the red fabric with the lady's face is older, I think--maybe late 1800's (?). I have a question: Is the navy blue color (on the pieces of navy blue fabric) just as dark on the reverse as it is on the front? If so, then it is a vat dyed fabric, and probably dates to the 1800's. My guess is these blocks are made from fabrics dating around the turn of the century, some before and some a few years after. I would NOT use modern fabrics to enlarge this top, with the exception of same-period reproductions. Stay true to the time period, imho.