Vintage Still-Life Watercolor Pastel Painting

Lovely vintage still-life painting of a primitive pitcher and squash in good condition. I believe the medium is watercolor with pastel on paper. Wood frame has a bit of wear on the corners mainly as shown. It’s taped on the back but may need to be secured better in the near future. There is a faint signature in the lower right corner I can’t identify. Small tear in the lower corner as well. Purchased in southern Arizona. Could be of Native American or Mexican origins. Measures approximately 16.5”x 13.5”. Please view photos well.