These gold-toned cufflinks by Kreisler Craft date to 1950. They were called "change-o-color" cufflinks because the ball rotates to different colors. This pair has red and a light gray pearl that catch the light beautifully. You can wear them red, gray or half and half as shown in the picture. They have a diameter of 9/16" and are in excellent condition. Signed "Kreisler Craft, US pat. pend.".