Electronic device cover and seal assembly

A cover and seal assembly for a smartphone with a touchscreen, the assembly comprising:

• a cover defining a space and having an opening therein with a peripheral edge through which the smartphone can be inserted and removed, the cover having a first thickness over at least the portion thereof which covers other than the touchscreen of the smartphone and a second lesser thickness over at least the portion thereof which covers the touchscreen of the smartphone;
• a seal assembly for sealing the opening, the seal assembly comprising:
• a base portion having a circular side wall with a top edge and bottom edge, an outer peripheral flange on the side wall for receiving the peripheral edge of the cover, an inner glass support shelf on the side wall near the top edge of the circular wall, and a lens fastened to and supported on the inner glass support shelf;
• a washer mounted on the outer peripheral flange for capturing the peripheral edge of the cover therebetween;
• a nut threadedly connected to the circular side wall for maintaining the washer in a fixed position on the outer peripheral flange.