late 1940's american vintage industrial single-sided chicago electronic repair storefront window "can" sign possibly fabricated in part and serviced by the white way sign company, chicago, ills. the glass panel with hand-painted finish, contains distinctive red lightning bolts emanating from the bold black words. the can is comprised of pressed and folded steel with uniform brown painted finish. the hand-painted glass panel is free from cracks or breaks. 25 x 6 x 5 3/4"