Original Watercolor Painting Farm Windmill Landscape signed and dated Edward Sandoval 4-13-70

Unframed original watercolor painting depicting a rural farmhouse scene with a windmill, trees, and open fields in warm earth tones. Painted on white watercolor paper with deckled edges, mounted on a backing board with tape clips. Some minor staining visible on the paper. It's signed by Edward Sandoval 4-13-70 I'm sure it's a rare item to have i belive it's the famaose painter in new Mexico Edward Sandoval and he owns art studio doing new Mexico scenery with oil paintings from what I'm learning i actually stumbled upon this painting hidden behind a picture frame there's another signature Ginnie Siefert I believe a previous owner there was a note on the backboard of the painting happy 34th day love mom